Lurk for free, but pay to post. The Fool is the original online-investing hangout, started on aol before there was an Internet millionaire in sight. They're still talking up Iomega stock. Another gathering place, as the name none too subtly suggests, for wild wild Web traders. This is the place for devotees of technical investing to debate the patterns of stock movements.
Many posts take the form of annotated charts.
This Web-only service really boogies on Web and tech stocks. Hype here can move Net stocks. Market commentary throughout the day. They've all got great news indexes that link to online stories.