not a PBAL fan--- but I am a knitter.. PM me if you want to talk knitting.
Don't know where you are.. but there are many polyamory meetup groups at meetup.com, or google polyamory and your city name. I have a telephone interview for a job later today. I've already checked out the poly groups (yes!!! groups!!!) in the area.. (okay, it helps that "the area" is near San Francisco - quite poly friendly.)
I've been delighted with meeting the wise and wonderful polys in my area (Tampa) . It seems the sci-fi, Wicca and SCA are three areas where polys are comfortable. Which makes sense- those are groups which accept people as they are... and encourage personal growth.