Too much internet?

I’m wondering if I have too much internet. By which I mean if I have too much of an online presence – too many profiles and site memberships. That I use regularly, I have this blog, a Facebook account, an account on Humble Voice (an art sharing site), My Happy Planet (a language learning community), and Flickr, as well as two knitting communites – Men Who Knit, and Ravelry, not to mention Textkit, my Latin and Greek community. The website i’m learning Icelandic through requires a profile, and I have one on YouTube and a few forum boards I don’t use any more, and I think Blogger.

I’m wondering if I have too much of it. Is it a good idea to have all those profiles, all those little fragments of information about oneself floating around in cyberspace? Should I delete extemporaneous accounts and profiles, or does it even matter now?