I have only used yahoo! one-on-one and it's mediocre in my (limited) experience.

As for free filtering programs: try out webwasher : blickie

I haven't been in Paltalk (or the threads) in ages, but I hope that in the not too distant future I'll be able to participate in a song circle once again. I always got a kick out of telling my co-workers that I was singing with mudcatters from around the world on a Sunday evening.

Cheers,

JudyO