Capcom are making RE5 just for the wii, they may port it to the 360 and they most likely wont bother with the ps3 version.
Think about it, we have not heard shit about it in a while, not since the africa clips. They were just cutscene's, which could be fmv for the wii. Maybe the silence means they have scrapped previous build and switch to the wii.
Capcom has the balls to do this, they did the exact same thing with MH3. They also almost completed RE4 and then scraped it and made a different RE4 and they weren't even changing platforms, just wanted to go a different direction.
Nintendo is where the RE fans are these days, RE4, REmake, RE0 on gamecube, then RE4 and RE UC on the wii have extremely well.