I just wrote a quick review on my experience with renting a lens from The Lens Depot located in Oviedo, FL. It was local to me so a no brainer to save from shipping and rent the lens from them. I noticed they also rent out lighting equipment and more. Overall the experience was great. The Lens Depot's customer service was very helpful and the lens I rented was extremely sharp. I will definitely will use them again if I ever need to. It is too bad they dont have a 200mm f2L IS lens to rent. You can read a bit more on my blog if you'd like. 
http://www.trungnguyenphotography.com/?p=470
