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.
10/18 - King Diamond
10/24 - Pallbearer
11/01 - Suffocation
11/30 - Devin Townsend
12/06 - Distant Worlds: the Music of Final Fantasy