I just saw this post and made an attempt to configure my Ceton tuner. I was eventually able to set it up, and was happy to see it work, but either I haven't configured it properly, or it just won't work for my setup.
I have 4 TVs each with their own HTPC. PC 1 has a Ceton USB tuner connected to it, and currently uses all 4 tuners for my recording (through WMC). This is, also, the PC I run my Media Server on, as J River is much better at handling my DVDs, BluRays, Music, and Pictures than WMC. A second PC, has a second Ceton tuner which has 1 of its tuners configured to that PC, and the other three networked to my 2 other PCs using Ceton Network Tuners. The setup has worked great for the last year, with some minor glitches on the server when JRiver and WMC run at the same time, but overall it works.
I setup the TV on the Media Server and was able to watch TV; I, also, was able to watch it on a client. The video, however, stuttered quite a bit, and took a good 5-10 seconds to change the channel. It also caused JRiver to crash twice. Compared to WMC, this is not acceptable. I, also, admit liking the RecordedTV HD plugin for WMC better for TV management than JRiver.
I would like one media player to handle all my needs and think this is a great start to incorporate the Ceton tuners (by far the best I have used), but either would like assistance in troubleshooting my issues, or see some improvements to its stability and responsivenes.