Thanks for the tips, all! Chiming in from Reno, NV.
I save my chill water for clothes washing. I loose maybe 15 gallons a batch to rinsing on the grass, spillage, and dumping the cleaning bucket after everything is cleaned. A brew pump with whirlpool arm would help as well.
+1 to clothes washing. If I know I have a brew day coming up, I just wait on laundry and plan ahead. Chilling water goes into buckets, buckets into washing machine.
Also, as mentioned by others, plate chiller is definitely helpful.
By far the biggest water saver I've found is a keg/carboy washer. Uses 1-2 gallons in place of 5-10. I'll let my dirty kegs and carboys stack up, then do a bunch on one day. Amazing how clean it gets them with a little pbw and a lot of time (bonus is NO scrubbing required). Also use for sanitizing carboys/kegs. Again, sanitize all my kegs at once and store under light CO2 pressure. Homemade version on previous link looks great. The one I use (easily modifiable for multiple purposes) is similar to this one: http://www.morebeer.com/products/mark-ii-keg-carboy-washer.html