Plurk sure seems to be picking up momentum fast. Despite a UI that is, if nothing else, polarizing. I’d say I’m one who finds the side-scrolling UI less than ideal, but I keep using it. Either it’s growing on me, or it’s just to interesting to ignore.
Lot’s of cool people there already, but plurk’s differentiator (other than the funky UI) seems to be it’s karma. Even if you think the whole idea of using the service simply for the sake of getting “points” for using the service is pretty silly (it is), it’s appealing in a way, and mildly addicting to watch karma slowly grow.
Points as well that plurk’s UI works flawlessly… for something as odd as it is, that’s something of an accomplishment, which I’m sure is a testament to a lot of testing.