Hmm.
Quite a lot actually, but most of them I don't visit anymore. My Yahoo account from 1998 still works last time I checked though, maybe I should take up playing chess again and cripple my rating
. Also got some pretty ancient Hotmail/Softhome accounts, stopped using the latter however once the ditched the free pop3 service.
In terms of forums the only one I regularly visit is ADSLGuide. From time to down I'll browse the forums at Quakeworld.nu, funky (txtspk4tw innit!) and freddyshouse.