the way plurk is layed out, though it isn't as usable as twitter.
richard
says 2008-06-08T02:13:55.000Z
responses make it better in some respects.
Seems like it will take a fair time to get used to. Bring on an API I say.
mikej
says 2008-06-08T17:04:40.000Z
I like the threading aspect. Jury still out on the time line interface.