I read and post in forums (and moderate one in particular), do research, send/receive e-mail, keep up with news, buy music, find song lyrics, shop and buy electronics and books, solve problems, IM coworkers/friends/family, do business, try shareware, find the answers to random questions, try interesting web sites, maintain a website, post photos, read documentation, transfer files, and answer awfully general questions.
No, I never ordered a pizza or gambled online.
Since plenty of people do all of the above, perhaps we should each post to this thread only if we have something new (not previously mentioned in the thread) that we do online.
Listen to online radio stations
Shop Browse real estate
Online Banking (but I do that at work because they have such a good firewall)
Read message boards
Browse music on Itunes
When the Apprentice was on, I would watch the extended boardroom on Yahoo! TV (NBC.com doesn't seem to work on Apple browsers, humph).