Hey guys, so I got into collecting a little late, and just joined the site. I've met some real nice folks for trades/sales, and it struck me that the site could use a friends list (or Pal List?). I know it's a bit of work, but thought I'd say something.
Link located here: http://forums.penny-arcade.com/discussion/199994/pinny-pals-slack#latest
The site isn't really a social hub, it's mostly focused on trading and being a database. It had plans for pin groups and what not but it really seemed it would be under utilised against the time spent developing it.
http://pinmash.info - Head-To-Head battle of pins! Choose the most desirable.
http://pinnywise.com - iOS pin collection tracking app.
My Delicious Pins For Trade