From what I can tell, only certain devices currently support 3D; my PS3s (fat 60GB and slim 120GB) both stream 3D movies at 720p; but my LG and Panasonic 3D BluRay players don't seem to be able to see the 3D titles. The 3D PQ appears to be much better than Vudu; it looks to me to be frame-packed 720p
As for titles, I found about 50, most of which I already own; hopefully we'll get more. I was surprised to see Beowulf available in 3D; strange since it isn't available for purchase yet. I also saw one of the Sammy's Adventure titles.
On my 2010 Samsung active plasma I experienced quite a bit of ghosting, far more than I typically get on that TV. Not sure if it was due to the transfer, the resolution or some other issue. Going to try to see if the same thing happens passive LG.