One sock down, one to go:
The pattern is Retro Rib Socks from the book Favorite Socks (sock patterns from Interweave Knits). It's an easy pattern, but it is not entirely brainless.
The yarn is Socks That Rock from Blue Moon Fiber Arts, in the now-discontinued Cobblestone Country colorway. I love the colors, and I love working with the yarn. These socks will be pure joy. Now all I have to do is finish the second one ...