Sockapalooza is a Knit Exchange programme. Each member knits a pair of socks for someone else, but the recipient does not know who is knitting their socks. Obviously we've all been given the appropriate foot sizes and yarn/style preferences of the people we're knitting for.
Here are the blog entries that refer to Sockapalooza:
Pictures of sock progress
Sock 2 is nearly complete
Finished!
Sockapalooza Socks that I received!