It might be Led Zeppelin. Although with a different car commerical on at every break I may be confused. Earlier tonight I did see a car commerical with a Zepplin song and I know I saw one that said "Moving Forwad" on it as well. I'm just not positive that they were the same commerical.
The bad news: the song isn't available anywhere (it was written for the commercial and won't be out on an album until 2005.) They say Toyota will release a 1 minute version on their site at some point.
Thanks, Peter. After posting the original message, I googled for it, and found the Website.
I agree about the bad news.
For those who haven't seen the commercial, Fisher sounds a lot like Canada's Chantal Kreviazuk, which is a good thing, IMNSHO. There are also quite a few files to download from Fisher's site, so you can get a good sampling of what she/they sound like.