We have the Fisher Price 3-in-1 (I think thats what its called?) Where you can actually take the seat out and use it as a stationary seat, or a rocker, as well as put it in the swing.

I RAVE about this swing. Actually, I saw a couple look at it and another swing, and I actually spent 10 minutes showing them the 3-in-1, and raving about it LOL! I *LOVE* it! It was pretty much the only way she would sleep during the for the first 6 months (except in my arms lol).

It takes batteries, but we used it every day and only had to change them a few times in 6 months, so it doesn't chew through them, its actually really good. I wanted a plug one as well, but the fact that we could take the seat out and use it as a rocker was GREAT, so we traded off the plug featured for that.