Canon unveils 'first' dust-busting digital SLR

Anyone know how the physical size of the ccd sensor compares to the 300d/350d, this is the real make or break for this camera me thinks...

Sensor is the same as the 350D Dave:

400D 22.2 x 14.8 mm CMOS sensor
350D 22.2 x 14.8 mm
300D 22.7 x 15.1 mm

www.dpreview.com/news/0608/06082416canoneos400drebelxti.asp

Looks like a nice camera, from an astronomical point of view it is very similar to the 350D, the only real advantage I see is the rapid fire rate which would have been useful at the solar eclipse, beyond that I dont see a need change from the 350D, even at that I think I'll be sticking with the 300D,
Does the bigger LCD mean a shorter batter life?, in the likes of camcorders it ususally does.

BTW, the 300d, 350d, and 400d all use CMOS sensors.