I'd heard of Tool but thought they were just another DevilMetal group for some reason. Listened to the entire cut an while not exactly my taste, I found it listenable - surprised me. Made it through all 10+ minutes.
Noticed yesterday my favorite record store (tons of great vinyl) had the the new Tool CD on sale this morning. They posted that they sold out 3 minutes after they opened this morning.
Will be keeping an eye on Tool and thanks for the Dream Theater discussion. Need to explore them as well.