OUR TAPE DIALTONE LINKS MAIN PRANK CALLS WEBRINGS
This guy is the best, no competition. Check this site out.
These guys are probably the best i've heard after Blackout, and they update a lot more often than he does.
PLA -- Phone Losers of America, excellent page with sound and video clips, news, articles, and their magazine too
More links coming soon, right now i'm to busy making calls :)