But this year, I've discovered (three) four great Pink Floyd's Dark Side of the Moon tributes which are great and special in their own way; and I encourage any PF and/or DSotM fan reading this to have a listen.
These tributes are by:
The Flaming Lips
The String Quartet aka Vitamin String Quartet
Sam Yahel, Ari Hoenig, Mike Moreno, Seamus Blake aka Jazz Side of the Moon
In order: An awesome psychedelic tribute; a tribute by The fucking String Quartet (if you know this group, you know how great it's gonna be, don't you :D) and a jazz tribute.
Sex in my ears.
Go get them and........ please tell me more tributes worth to be heard. Whether they are PF tributes or not, it doesn't matter.
Update: 26 February 2010: a couple of days ago I discovered the good Dert Floyd (Dert) tribute, entitled "The West Side of the Moon". Beats with Pink Floyd samplers. Cool.