Chances are the 360 will break shortly anyway so I say go for it

Just wondering if it's likely to cause any problems as the PS3 is a bit heavy. I have visions of it causing problems with the 360's DVD drive or something. Anybody got theirs stacked?

PS3 kills 360, a headline Sony is dying to hear.
That would be really funny. to the OP why dont you just put them on their sides next to each other or is the shelf not high enough to do so?