It's been a bit poor up until now relying on web applications only. However, come this friday the apple "app store" opens up and we're all expecting apps like AIM etc. to be there.
The unlimited data plan on o2 makes it really great for that although the on screen keyboard isnt as good as a real one for typing IMs. I mean it's "good" and better, much better than you'd think, but probably not as good as a sidekick
Okey Dokey! Looks like she'll go for a Sidekick Slide then.