At Ellen's bridal shower one of my cousings, Tiffany, had a great carseat cover. So being a crafty girl I made my own, and I have to say I love the way it turned out. The nifty thing about these are that they attach under the carseat arm with ribbons so that the blanket doesn't fall off or end up in the baby's face. Also you can carry the carseat without fighting a blanket that is inevitably either too big or too small.
I made this rag-style quilt in a couple of hours out of some clearance courderoy and my wearing out maternity jeans!

While I was at the store today I had a lady stop me and ask where I'd gotten it. I told her I'd made it and gave her my name and number, I think I may have sold one already. So if anyone' interested, they'd make great new baby gifts, let me know if you want me to make you one. But they're so easy everyone will probably just make their own:)