lol" you have a choice of many their are alot of them but of the 3 top ten go with Technorati , Delicious and Digg sign up for a free account and your on your way try to get the widget on your sight or blog lol"
If you do mean social networking and not bookmarking, MySpace is probaly the easiest to start with. Adding friends is fairly straightfoward and quick and most comments are viewable to everyone (unlike Facebook), so you'll get better exposure. It is ugly as sin though :|
silveraden in my opinion My space is more of a people to people type blog or those wondering in the a different direction ask me if Ive used My space I will say NO they suck" meaning stick to the norm try to stick with ideal blogs like wordpress and bookmarking sites these are highly recommended