There are innumerable members on these forums that I can recognize readily.
However I think I know Jazz the best. Being the host for one of the few servers on the MS I bother going to as well as helping him with some of the textures for his levels and beta testing.
Haven't really ever been to SRB2FUN, (unless you want to count a quick check to hear about the contest pack, at which point I left because it didn't seem necessary), so I really don't have a chance to know many people any better than familiarity on the forums.