I think Nintendo only confirmed Component, Composite & S-Video on their American website.
For the PS3, you should be able to get adapters from HDMI to DVI, but at the very least these will only work with movie content if the display supports HDCP (which is optional for DVI, but not for HDMI).
I am also quite interested in definite answers. My current plan is to replace my Dell 2005FPW with a 2407 which also has component inputs, so all the bases are covered.