I’ve been playing around with dpn’s and my very first project was a phone sock (phone cozy, phone sleeve, as you prefer to call it). I made up the pattern myself (you can read the pattern on the side bar). The dpn’s were really slippery aluminium ones – old ones my mother had, since she is using the new ones, and the yarn is leftover sock yarn from a pair of socks my mother knit for herself. Anyway, see the pics:
You can see the little sock for my smaller phone (yes, I own and actually use two different cell phones *geek*). I will also knit one for my bigger phone, and one for Jan’s (he asked me to, before even seeing mine!).