Do you squidoo? seems a bit better than twitter and discussing your toilet habits in under 160 letters, anyway I never liked social networking sites, ie blogspot crap, myspace and all the other rubbish for retarded teenagers and middle aged single mums, but this squidoo is pretty good.
I spent in all about 15 minutes on each squidoo, they are pretty good if you have a relatively active or updated website for mingling your links in with others, and really easy to set up, plus you can even make money off of them, although I choose to donate mine all to charity, well when I say all mine I mean any that the squidoos make, Thai Recipes and Learn Thai.
You can set them up to auto update on RSS feeds, photos, videos, blogs plus other stuff that I have no idea what it maybe.