I failed to realise 2 salient points:

• Twitter is part of the larger "web experience", so limited and simple functionality is actually a refreshing change
• Integration! (I've added mine to FaceBook)

On the integration front, here's my Twitterific self in action:

Folks seem to be using Twitter for lots of things, and it seems pretty effective from what I've heard. If you can't beat them, join them. Or at least attempt to thinly justify this as a "research exercise" in personally evaluating socially constructed and interaction-driven web resources. Or something like that...