We should probably all do this every once in a while, just as a way of expanding our connections a bit.
Here are the social networks that I'm reasonably active on:
As far as IM is concerned, the only one I am on with any frequency is Meebo, for which you can use the widget on the sidebar.
I'm on LinkedIn, Nature Network and Connotea, but not particularly active. I don't currently have any other active blogs.
So, friend, follow or subscribe to me and let's connect online. In particular, if you haven't joined my favourite of the bunch, Friendfeed, I would encourage you to give it a try. There are active and vibrant library, science and technology communities there, all of which I have lots of connections to. It would be quite easy to start with friending me and branch out into those areas and explore. Friendfeed is by far the best source for conversation online, vastly superior to Twitter. FF is talking with a group of friends at a bar or restaurant, Twitter is shouting at each other from across a crowded concert hall.
(Yeah, I know I should have a text box on the sidebar with all this info. I'll get that up and running fairly soon now that this post is done.)