hehe .. this is indeed a combo deal, so you aren't getting a free board. If you read the description is clearly states that, plus there is no 'Add It to Cart' option (I know, thats a minor technicality). In all honesty, this is a 'Buy an EVGA 7800GT card and get an EVGA NF4 SLI board for $40 after a $20 MIR' deal.
I'm in for 20, I just called CS and demanded this deal or I leave them a lousy rating at RR !!!