Thanks for the info guys!
From the pics of the V2 and V2b, I can't really tell the difference. Again, I don't have it yet so all I know from the pic that the seller sent me is that it's definitely not a V1. It def looks like a V2 or V2b. He did, however, assure me that it's an AP-SUB-003. When I checked with Cobb tech support last week before purchasing it, this is what they said I needed to worry about. I believe they said the AP-SUB-003 will work on 2008+ WRX's (and STi's, etc.). I think that's where some of the confusion lies with me and other as well. I kept thinking that the model number, in my case the "...-003" part, stood for the Version number. With that thinking, a AP-SUB-003 would be a V3. An AP-SUB-002 would be a V2, etc. However, it would appear that that's not the case at all.
If anyone from Cobb can chime in on this it would be appreciated. I guess it's too late now since I already payed the guy and it's supposedly on it's way but hopefully knowing it's an AP-SUB-003 is all that matters.