This is a very timely thread. We have 8000 miles on our tandem (rear disc) and my single has two BB7. Now that I'm running a Shimano ICE rotor my LBS suggested I might adjust the alignment frequently to minimize rotor deflection. It's an easy procedure and I'm going to do it this weekend. The disassembly and clearning also sounds very, very worthwhile. Another tip I got from Bryon at Crank-2 is to use a torx T-25 to adjust the inner pad. That inside adjuster is a real pain.

I'll order some spare parts this weekend. Thanks!