I'm crocheting a giant granny square afghan (one big, neverending granny square). I'm also knitting a ton of scarves. (technically, I'm purling them...cant do the knit stitch with my numb fingers right now, but doing garter stitch with purl looks just like garter stitch with the knit stitch.)

I have a pattern on my crochet blog for a rectangle granny square. My grandmother and I came up with it. (ok, grandma did most of the pattern. I helped by testing the pattern and suggesting changes.. She never wrote it down, she and I both had it memorized tho...I wrote down the pattern after she died and posted it to my blog. I wrote it down because I started having problems remembering how to start it...the MS probably had something to do with that now that I think of it)

The rectangle pattern is one that works up fairly quickly and pretty much any yarn can be used for it. (as long as your fingers on the hand you do your yarnovers with are capable of doing the yarnovers)

If you crochet or knit, a good place to go to search for patterns is Ravelry.com

About.com has a good crochet forum, and a good knitting forum. Lots of helpful people ready to suggest projects to people.

Oh, and Crochetville.com is another good place to go for suggestions if you crochet.