I just added a new section to my site, “Playa in Action”, which gives real-world examples of how Playa is being used on a few awesome websites. Have a look!
http://brandon-kelly.com/apps/playa/action
Down the road I plan on expanding the section quite a bit, making it a constantly-growing site gallery, and giving each site its own page. So if you have a site that’s using Playa (1 or 2), get in touch with me!
-Brandon