I've included a sound file below (but it doesn't include the part of the song with the harp solo, unfortunately).

http://music.barnesandnoble.com/search/product.asp?z=y&WRK=81095

Many thanks,
Bob

The song is in the key of "Em" or what I would more accurately describe as "E" Rock (where a minor pentatonic scale like a blues scale works great).

I'd guess that the harmonica played on this would be an "A" diatonic in 2nd Position. It would sound good though to play a key of "D" diatonic in 3rd Position. As you said, there is no harmonica on this exerpt, so that's the best I can come up with.

Play on,
Dave Gage