If you have ever been even remotely intrigued by the "Snuggie" blanket that's been advertised on TV so much lately, here's a pattern for a similar sleeved blanket:
http://www.sissonfamily.com/Sewingroom/images/2006projects/thesnuglet.pdf I'm thinking of making one for myself...I can see this being handy at camping events when I want to sack out in my reclining camp chair. Plus, I can make it out of whatever color or pattern of fleece I want, which is a bonus.