ICQ is stable, quick, full-featured, and as close to a standard as I think IM approaches. It's a lot less cluttered and easier to navigate. Instant messaging has also delivered some unexpected value for those with certain physical disabilities. For the deaf, instant messaging opens a whole new world of communication that has the potential to eliminate TDY terminals. Then there are those who have a different take on instant messaging altogether.
Instant messaging is as dumb as bringing a telephone into the toilet.
We're certainly not going to try to argue with that, but users will have the final say.