50D? The 40 is just a year old and has no real competition so I doubt it.
The 5D2 has been LONG rumoured - not sure why canon has take 3 years to update it. And if this is the update it's weak IMO, ISO wise, compared to recent release from Nikon. Perhaps the OLED LCD has been the hold up? Canon's been working on it for a long time now. Not sure whey faster FPS..perhaps wedding photogs (PJ types) have requested it -many use the 1D3 for this feature so perhaps that is the reason.
I'll believe it when I see it, and kinda hope nothing is coming...that way I won't feel bad if I don't buy it.