As a longtime passionate UU, I say YAY!!! Many of the poly people I've known in my life were through UU connections and I have heard that UUPA is growing as an organization.
GreenEarthAl on this forum is also a UU. If you want to find some good networks to get involved with, I'm sure Al or me could hook you up. I think you'd find the work they do in identity politics interesting too.