Dustin have you used or do you own the Tamron 70-200 2.8 Di VC USD? I would love to hear your take on it. With the Canon rebates ending I might be picking one up as opposed to the Canon version Mkii. (($800 USD less)
I don't have one, although I am strongly considering purchasing one. I think my limit for the lens is $1300 before tax, though, a price point I expect the lens to hit within four to six months. I volunteered to the PhotoNews guys to do a review (one of their employees was on here and questioned about a reviewer) but got no response.
If (when) I do get my hands on one, I will do a full review.