Our local yarn store has just started carrying a striped sock yarn by Turtlepurl. The fantastic thing about this yarn is that it's sold with two 50 gram skeins attached together, both of which were dyed simultaneously, ensuring perfectly matched stripes for your socks (I have a confession to make: It really, really annoys me when the stripes don't match up). The colour I used here is "autumn".
Ravelry notes are here.