I'm gonna respond to this as a genuine request. If it's wasn't, I'm hijacking the thread!

I regularly read newsgroups about the instruments I play: acoustic guitar, electric bass, upright bass, mandolin, bouzouki and concertina (wannabe!).

I like these websites: concertina.net, Co-mando, MandolinCafé.

My latest find is a site for bass and guitar:
bass and guitar learning site Lots of free lessons (tab AND sound!)

Rich McCarthy