All my footage so far is from my Canon 7D, 1080P 24fps. No problems, although I'm a newbie and still trying to get a grasp on the best camera settings, especially shutter speed for video. I'm using Vegas 11, and the biggest project I worked on so far has 12 tracks and I don't know how many files off-hand, but it's quite a few. These consist of a combination of video, audio, still frames, many transitions and generated media including Sony's new titler) Nothing with Titler Pro yet, although I played with it on it's own. It looks pretty slick and I'm looking forward to doing more with it.

I do have a RAID 5 setup, using AMD's onboard RAID controller. I would say this is OK for redundancy, but not the best for speed. If you're looking for speed, look at a dedicated controller/system. If I were doing this for a living, I would definitely go that route.

I have tried GPU for rendering, but i have not noticed any significant difference, possibly because I have a 6 Core 3.2Ghz CPU. (I probably need to test more...)

I generally shoot with a Panasonic GH1 at 720p and a GH2 at 1080i. Use the files directly on the timeline with no issues, either at home or at work.

In my last project at work I mixed the following native camera footage on the same timeline:
GH1 720-30p
GH2 1080-60i
5DmKII 1080-60i (I think)
D7000 1080-24p

GPU preview, GPU rendering; click my name to see system specs (work system)

Vegas 11 was a bit unstable, but mostly OK. The instability was a momentary (~10sec) freeze when clicking on a clip in the project window when full screen preview on my secondary monitor was turned ON. Upgrading the graphics drivers to the latest version instantly cured this issue. And on the plus side, preview was very nearly real time, a real joy to edit. Rendering was very fast, perhaps just a tad faster than real time.

I use my Nikon D5100 more than any of my other cameras. I just love the image it produces. I stopped working with Cineform because of the black frame issue and I work mostly with the native files though I sometimes do use mxf or XDCAm .mp4. The native files tax the computer more, but I have an i7 quad core so it still works quite well.

No problems with a Nikon D300S files. PAL, 720p .

geoff

I'm using a Canon 60D exclusively now for video. 1080p/24. So far I have just used the native canon files, thought I might have to convert them for speed but with the added performance of the GPU (I did upgrade my graphics card to a GTX 550 TI when V11 came out) I have been quite happy with the performance. Footage looks outstanding, btw. I usually do my editing and then add the hardcore effects like color correction when I'm done. or turn it off while editing, and try to do as much heavy lifting when I do a final render.

My approach is similar to ddm. I use native DLSR files from Canon 500D/T2i, 600D/T3i, and a 5D Mark III. I mostly shoot 1080/24p and they play at full frame rate and Best at Full resolution on my machine (see my profile for system specs). The caveat to this is that if I add more than a levels FX or if there is some compositing the frame rate usually starts dropping. Usually I can run at full frame rate at Half resolution on "Good" or, if there are a lot of FX's, on "Preview".

I've never played with transcoding my DSLR footage in order to improve speed. I've never felt the need to.