tommorris.org
Social networking type? I'm on Twitter, Jaiku, Pownce, Flickr, last.fm, upcoming, LinkedIn, Technorati, del.icio.us, Mash, Advogato, Github, Disqus, Dopplr and many more.
I'm something of a voracious reader and publish a list of books that I'm reading, that are in the queue and that I've read. Some of which even get reviewed. Of course, my music collection is neatly stewarded by last.fm.
I maintain a bunch of mashups and datasources including the Twitter Tube Tracker, plus I give talks and lectures.
My FOAF/Cwm tutorial is available on this site also.
Just released: Skype and Gizmo Operator plugins.
Code 
I'm working on updating and rewriting Rena, an RDF library for Ruby (patches and collaborators welcome!).
I maintain a RELAX NG schema for OPML 1.0 and 2.0.
Recently opened loops
I'm all about driving new technology and kicking old technology in the arse and trying to get it or keep it going. Two of these are the Semantic Web and IPv6. I'm also involved with microformats - specifically with vote-links and XOXO. I am a big fan of the GRDDL specification and maintain the NSFW profile.
Recently, I wrote a post entitled A gendered Semantic Web. I have put together a project called GenderHack over on GetSemantic to do some research on gender/sex/relationships issues, specifically in response to concerns about social networks and gender being a "binary".
I have recently written on subjects including attention, a system called Blocks which I'm mulling over. I also think schools should stop teaching people how to use Excel and start teaching them programming instead. Did I mention that I like Python?
I dipped my toe into using Python on OS X recently with a post all about accessing Keychain items from Python using PyObjC, and last month put up a tutorial on querying RDF with Python using SPARQL.
As much as I love my Palm Pilot, but I wish Palm were competent.