Sporting Goods, Shoes, & Workout Gear: $10, $15, or 20% off at Eastbay.com
Eastbay offers a huge selection of running and cross training shoes, workout wear (including Under Armour clothes), and gear for other sports. Their service has always been good and they have a good return policy, still limited to 20 days though. Here are coupons for the month of June (all expire 6/30/2005):