^ I couldn't like this song as I can't like Kid Rock's All Summer Long. Personal gems of classic rock being regurgitated into mainstream sampling. Doesn't sit right, as snobbish as that may be.
But I am also a massive Led Zeppelin fan who feels as if they are pretty much sacred ground, so I shouldn't discuss it. 
I don't mind sampling if it's done right. I felt Diddy did a great job with the song. Considering that Page was involved with the making of the song, I felt that it gave the song more credibility of sorts then some band/artist sampling a track just to enhance their own music without the involvement of the original artist. However, that was ten years ago before Diddy started to sample EVERYONE. If it came out nowadays, I might feel different.
My least favorite sample is BY FAR Eminem's sampling of Dream On. I'm in the same boat when you refer to 'sacred ground' considering Aerosmith is one of my all-time favorite bands.
In Kid Rock's case, yes he samples 'Sweet Home Alabama,' but he adds more to it that gives it it's own identity. Plus, he gives props to the song in the track, so he doesn't totally dismiss it. I wasn't a fan of it at first, but it's really grown on me as on a whole he put together a suprisingly strong album. Easily his best since Devil Without a Cause.
Actually when I hear that song, I think of KFC more so then Skynard
