I will sadly admit I do most of my day-to-day online sharing, including my photos and general musings, at Facebook these days. During the NFL season, I'm a regular contributor at the Wingheads Philadelphia Eagles' forum (where I'm user TGryn). My longer essays, which I'm hoping to get back to soon, are usually posted at LiveJournal. I also occasionally post to Twitter, but mainly just to share something that struck me as witty or amusing.
I am a former patron of alt.callahans, and also wandered with the Net nomads of alt.kalbo. I was formerly active on the Rust List (Neil Young) and the Chris de Burgh mailing list. I am still a member of the Eagles Virtual Fan Club (EVFC).