For those who may not have been aware:

http://www.tamron.com/lenses/assets/reb … _Sep05.pdf

I point this out because if you can find one, it might be worth it. Amazon had it w/Nikon mount for $789 w/free shipping (before the rebate). That makes it $589 after rebate. Web site said only 3 left in stock, however.  B&H also has them for about $20 more.

Other Tamron lens rebates also still available.