Hey zippy,
I'm not surprised at all. A lot of the more recent bands are taking, very directly, music from older bands and playing it with their own sound. It's not that bad though a lot of cases... I don't like Lenny Kravitz' version of American Woman though, that's just horrible.
As long as the job is done well and the song is generally good, I have no problems with that being done.
Cretin