Alright so for all the neigh-sayers that don't believe a timing belt/water pump change should be done before 80k miles...here's what mine looks like after 69,120 miles:
I pulled the pump out of the block and the impeller literally crumbled in one spot in my hand. The plastic is extremely brittle which was quite an eye-opener. I can't believe I even considered stretching this job out to 80k.
If you are considering putting this off past about 70k miles I recommend rethinking that. Granted a failing water pump might not be catastrophic to your motor, but plastic impeller pieces probably aren't a good addition to the cooling system.