I've been insanely busy, so Twitter has been my sole online presence in the past few days (via the Blackberry Google/Talk client, which works wonderfully).
Bruno jogged my memory today by reminding me of an IM snippets mini-blog that I used to maintain back in, oh, 2002 or so that worked in a similar way, but something about that epoch kept nagging me all afternoon, and I think I've finally nailed it:
Anyway, a couple of days ago I set up gozerbot on my NSLU2, and it has been keeping track of RSS feeds for me (a la Mimir, only more interactive).
My previous dabblings with IM bots showed me how this kind of stuff can be amazingly useful (other than nearly utterly pointless but oddly fun like Twitter), and I wish I had time to hack it a bit to give me stock quotes and other trifling stuff.