Yaobing,
Your suggestion about activating MC's server function and DLNA was spot on and solved the problem of no tuners displaying within MC. Note that I had to restart MC after activating the server and DLNA for the tuners to appear.
Suggestion: You may want to re-post your setup instructions and add the Server/DLNA step so all the instructions appear in the same place. You may also want to mention which QAM frequency option should be selected. I went with the default of (I'm doing this from memory so this may be slightly) QAM-HC3+ and it appears to offer most of my cable channels (more on this in a moment). Also you mentioned the need to select (again I apologize as I'm doing this all from last night's fleeting memory) QAM Cable as the tuner type but IMS the option at the top of the list (Digital channels or something like that) is selected by default. Do both options need to be selected or just QAM Cable if I'm only using a Ceton tuner?
Quick Feedback: I've only spent 15 minutes or so experimenting with the Ceton within MC on a limited PC (built for Ceton tuner sharing only so no space for recording TV for example). Thus my comments will be likewise limited. My experience was pretty much the same as Stottle's.
* Like Stottle, when tuning a channel in standard view it would take a few several seconds with a black screen to see an image. Once display began, the sound was seriously distorted and the image heavily pixelated for a few seconds as buffers filled up. But once they did audio and video played well.
* I used a wireless keyboard with built in trackball/scrollwheel and experienced the same thing Stottle did with the image zooming in and out if the cursor was on the screen.
* I tried the rewind and fast forward controls. They work but, after using them then returning to normal playback ~ 60 seconds later the image froze and the sound stuttered (best described as a continual looping digital distortion sound. Playback had to be stopped and re-started to end both symptoms. In short, so long as I played the channel without RW or FF it played well.
* Though I've only tested a few HD channels within my cable package I consistently watch, they all play fine (with the caveats of my prior bullet point), with the exception of premium channels (in my case, HBO). Anytime I tried to tune a SD or HD HBO channel, I experienced one of three errors: The MC message "no signal detected", or "error with playback-restarting" (I only got a black screen with no sound afterwards), or a gray screen with no sound or image. Thus, it appears at this point MC can't play the cable channels with higher level DRM applied. I'm using Comcast for cable TV with no SDV, and all testing was done via Standard View.
Suggestions based on my limited experience so far:
* If possible, try to speed up tuning time once a channel is selected.
* On a related note to the prior item, if possible keep the screen black with no sound long enough for the buffers to fill so that when playback starts there is no sound distortion or pixelated image.
* Alter the UI so the scroll wheel does not zoom the image in or out when the cursor is anywhere on the screen, but keep the function where it changes volume when the cursor is on the volume bar.
* Modify the RW and FF buttons so you don't have to hold them down for a second or two for the action to occur. A simple click on the control should instantly initiate the action.
* Fix the bug with the freezing image and distorted sound occurring shortly after RW or FF is used.
* Try to mimic as much as you can the UI of Microsoft's WMC. Whether one likes WMC or not, its DVR is superb in terms of effective UI and ease of use day to day. For example (and this is one more suggestion), when you bring up the transport and volume controls by moving the mouse cursor to the edge of the screen in WMC, beyond the basic transport controls MC offers the WMC bar also offers a shortcut icon for the gridview channel guide, record channel button, and close captioning on/off-three very useful controls that MC should also offer.
All and all, a very good initial effort for Ceton support.