I am still yet to try the RAW video feature on my 50D. I was held back by the lack of a fast card, and by high cost of getting one (Komputerbay cards are not really attractive here, due to the ridiculously high shipping costs - 40$; given how likely the card would have to be sent back, this is a non-starter).
I ended up ordering Lexar 32GB 1000x - am I right that this is the card most likely to get the most out of 50D in terms of RAW video? That's what my research here showed anyway. I was thinking of 16GB, but it appears that the 32GB is substantially faster (145 MB/s vs. 95 MB/s rated write speed); I don't really care about the size (I doubt I'll do much video recording with my 50D).
These cards are currently on sale at B&H Photo video (until November 8 ): 67$ and 119$ for 16 and 32GB, respectively (comes to 87 and 147 CAD all in in Canada; the cheapest you can find in Canada is 218 CAD for 32GB, so it is big savings).
Is there a consensus on what build/trunk of ML currently provides the best uncropped RAW video capabilities? I don't think I am interested in the cropped mode, as I am a big bokeh fun, and only consider doing video with my 50D to make use of my fast primes (like Canon 135mm f2.0 lens).