I get asked often by local photographers if they can rent my gear. While I’m usually willing to talk about it, I’ve more often been referring them to great places online to rent their gear. Here are a few to look into if you’re in need of DSLR bodies, lenses or other accessories (batteries, filters, etc.)
http://lensrentals.com — they also rent bodies, batteries, accessories. Awesome equip and prices. I hear nothing but great things about them from photographers.
http://glazerscamera.com — good place in Seattle that i’ve rented from before. Nice to have someone in the Northwest to deal with for speedy shipping at cheaper prices.
http://rentglass.com — I have not used them but they look similar to lensrentals.com