I added a little “feature” on my site; links to all my Social networking accounts (or anything remotely related to “networking”). You should see it in the author box at the homepage. If you have accounts on any of those sites, don’t hesitate to add me. I promise to unconditionally accept regardless if I know you or not… except for Facebook, since I try to at least keep that for people I really know.
Despite having all these accounts, It’s worth mentioning that almost none of them are being actively updated (apart from Flickr and YouTube for storage reasons – and I’ve got Multiply and LiveJournal being updated automagically). The reason why I took the time to register, even if I don’t plan to using them, was so I could have first dibs on the “nargalzius” monicker/handle on those sites.