I don't know anyone that uses ODF for anything other than playing around.  Businesses don't want to mess with that kind of stuff.

In fact, I'm trying to convince some folks to use open office as an alternative to pirating MS office right now and that's not going very well. Office is so familiar to them.  It's hard for them to get their heads around the fact that they don't need to use MS Office to produce MS Office compatible files.