The 500D video is fine in 30P mode, as crapex says. But you cannot control the depth of field to get out of focus backgrounds because the exposure settings are not adjustable. The 5D2 has a firmware update that allows manual exposure control, so it is much better in this respect. Much more ex as well, of course.
BTW 5D2 also shoots in AVCHD, but for some reason the files carry a .MOV extension so it's not so obvious.