There are a few patterns on the net for making 2 socks on 2 circs. I'm working on this one right now: Whisper Lace socks
and I was thinking about making these: Kaibashira.
There is also this one from Knitty: Straight laced socks
I would also recommend Cat Bordhi's book Socks Soar on 2 Circular Needles
. There are some patterns and while none of them really knocked me out her instructions on how to convert any sock pattern into one for 2 circs is worth the price of the book.
I forgot to mention that the Knitty pattern has instructions on how to cast on for the 2 sock, 2 circ method.
Hope this helps!