If you like Greg Mackintosh's riffs you should really check out the album Icon. The guitar-work on that album is fantastic.
I forgot to mention Katatonia closing their set with the riff from Demon in my review, that was awesome.
11/30 -- Devin Townsend
12/06 -- Distant Worlds: the Music of Final Fantasy
12/27 -- Unearth
03/07 -- Video Games Live