Dakota Dakota is an instrumental band, meaning they have no vocals. Don't let that scare you off though. They're extremely good, and extremely relaxing for the most part. They aren't acoustic or anything. They just... it's hard to explain. It's like how some songs have a guitar intro, and then the rest of the song starts. Their songs are like 3 min long guitar intros. Only not hard, although it is electric guitar. The thing I've noticed about Dakota Dakota is that after listening to them it makes the other songs on my playlist sseem stupid and hard to listen to.
Look, just go to their website and DL some of their stuff. Like I said, they aren't even big enough to be on kazaa yet, but if you like what you hear I have some things that aren't on the site, incl. one track that I like a lot more than the 3 they have available.
http://www.dakotadakota.com
Edit: forgot to mention, DL the Force Field one.