For example, I knew Biffy the Elephant Shrew from the rec.arts.comics.strips Usenet group.
Dopers you originally knew in another online community
I knew Paul in Qatar (Saudi) and MacTech from MacAddict forums. Was led here by Superhead ten years ago (!!, wow), a long absent Doper from another more obscure Mac oriented website.
I knew Tom Scud first via Livejournal, then via Aqoul.com. Then I married him and dragged him over here, not necessarily in that order.