I recently purchased a knitting project bag from here.  I bought their sock bag (like one of these).  I must say, it was worth the money, although I think I will try to make my own if I feel the need for another (since I’m all crafty like that…although that does require me to actually put down my knitting and sew something…).  However, I’m really enjoying having this bag.  I went through about a gazillion ziploc bags with my first couple pairs of socks because I kept shoving them down into my bag and the needles would poke holes through the plastic.   I like these project bags – they’re the perfect size for a ball or two of yarn, a finished sock and a sock in progress.  And they even have an inside pocket, where I store a tapestry needle in my valiant attempt to not loose it.