I've had a prototype Ceton MOCUR in my HTPC for the last ~4 months or so. After yesterday's announcement, Ceton cleared me to talk about it publically, so I'm opening this thread up to answer questions. To start off with a few questions:
-The unit seems to work well now
-It seems more sensative than the ATI units
-I don't even use my ATI units (they are unplugged) anymore
-It is scheduled for release in Q1 2010
-I do not have any pricing info that I can share
-SDV support works (I am using it)
-No, there is no way you can join the beta/buy a unit today
Beyond that, fire away 
Adding a FAQ section due to requests:
Pricing and Availability
Q. What is the official name of the card?
A. The official name is the Ceton InfiniTV 4
Q. How can I join the beta program?
A. The Ceton MOCUR's beta program is closed at this time
Q. How much does the Ceton InfiniTV 4 cost?
A. The Ceton InfiniTV 4 will retail for $399
Q. Where can I buy the InfiniTV 4?
A. Retailers are just beginning to take preorders. The only site known to currently be accepting preorders is Zones.com. It is expected that Amazon, CannonPC and others will be accepting orders soon.
Q. When is the InfiniTV 4 expected to ship?
A. The expected shipping date is May 31, 2010.
Provider Compatibility
Q. Will this work with (my cable provider)?
A. The Ceton InfiniTV will work with any cable provider which provides CableCARDs and will pair them in consumer-owned devices. This means any cable provider in the US including Time Warner, Comcast, Charter, FiOS and others.
Q. Will this work with UVerse?
A. No. UVerse is an IPTV solution and does not use CableCARD.
Q. Will this work with Satellite providers like DirecTV or Dish Network?
A. No. It will not work with satellite providers.
Q. Will this work in Canada? Other countries?
A. Generally no. If your cable provider uses CableCARD and is willing to activate it in your own device, there is no reason it wouldn't work, however there is no legal requirement for them to do so (outside of the US).
Q. Does the Ceton InfiniTV support Switched Digital Video (SDV)?
A. The Ceton InfiniTV supports SDV through the use of a Tuning Adapter. Scientific Atlanta/Cisco headends require one Tuning Adapter for every 2 channels (2 for the quad-tuner card). Motorola headends require only 1 Tuning Adapter.
Q. What kind of CableCARD do I need?
A. The Ceton InfiniTV requires a M-card (Multistream card). S-cards are not capable of decrypting more than one channel at a time and are not supported.
Features
Q. How many channels can I watch/record at once?
A. The first Ceton InfiniTV tuner to be released will be a four-tuner model capable of recording 4 digital channels at once. Ceton has indicated they have designs to support 2 and 6 simultaneous channels, but has not outlined their release plans for them.
Q. Does the Ceton InfiniTV tune analog channels?
A. No. The Ceton InfiniTV is a digital-only tuner. Most cable providers simulcast analog channels in digital form, so for most customers, this is not an issue. If your provider does not, traditional analog tuners can be used in conjunction with the Ceton InfiniTV.
Support and Requirements
Q. Does the Ceton InfiniTV work in Windows Vista?
A. The Ceton InfiniTV is only supported in Windows 7.
Q. Does the Ceton InfiniTV work on Mac or Linux?
A. OSX and Linux have not undergone the necessary CableLabs certification to support CableCARD devices, such as the Ceton MOCUR.
Q. Does the Ceton InfiniTV work with PVR software other than Windows Media Center?
A. No other PVR software has undergone the certifications necessary to support CableCARD devices. Some other software (SageTV) may support using Windows Media Center to schedule recordings, however these recordings will still be tied to the PC they were recorded on unless they are marked "Copy Freely".
Q. Can I install more than one Ceton InfiniTV in the same PC?
A. Windows Media Center limits you to 4 tuners of the same type without the Advanced Entertainment Pack 2.0 (AEP 2.0) installed, so more than one InfiniTV 4 tuner will not be supported by Windows Media Center. In addition to the limt of 4 CableCARD tuners, you can have tuners of other types (up to a limit of 4 each), such as ATSC, NTSC, ClearQAM, etc.
Q. Where can I get the Advanced Entertainment Pack 2.0?
A. The AEP 2.0 is not available separately. It is only available with the purchase of a PC from select OEMs.
Physical and Environmental
Q. Does the Ceton InfiniTV 4 have a fan?
A. The Ceton InfiniTV 4 does not have a fan. Prototype versions did have a fan, however the shipping product will not have a fan.
Q. What interface does the Ceton InfiniTV 4 use?
A. The Ceton InfiniTV 4 is a low-profile, PCIe x1 card. It will fit in larger (x4, x8, x16) slots, however there is no benefit. There are no plans for a PCI model.
Q. What are the physical dimensions of the Ceton InfiniTV 4?
A. The Ceton InfiniTV 4's dimensions are 7.85″ (L) x 2.535″ (H) x 0.68″ (W). << card should now be shorter due to removal of fan. Awaiting updated dimensions from Ceton.
Networking
Q. Can I share the Ceton InfiniTV 4 over the network?
A. The InfiniTV 4 shows up as a network card on your PC and can be bridged to a network, just like any other NIC. While this functionality is not officially supported, in general, it should work.
Q. Can I share the Ceton InfiniTV 4 between multiple PCs over the network, similar to how I share my HDHomeRun now?
A. No. CableLabs requires that the entire OCUR device negotiate DRM pairing with only one PC at a time. This limitation will apply to all MOCURs and is not a Ceton-specific limitation. You can have multiple InfiniTV cards in a single machine and share them all out over a network to different machines, but each card can only pair to a single PC.
MCTS:Connected Home Integrator, MCSE+Security, MCITP:EA, MCTS:Windows Internals, and about 25 other ones
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Windows 7 Ultimate x64 RTM
Advanced Entertainment Pack 2.0
Ceton 6-tuner MOCUR with SA M-Card
3x Cisco STA-1520 Tuning Adaptors
Gigabyte GA-965P-DS3 motherboard with Intel Q6600CPU, 3GB DDR2
ATI Radeon HD4550 512MB
Hitachi 2TB HD