Indeed not very impressive when you factor in the price, especially when you consider 3Dmark is intensive DirectX benching which should give ATi the advantage anyways...
I will say that I like the idea of crossfire being able to use any two existing cards, they don't have to be exactly the same as with SLI meaning a card you buy now can still be used in the future for that little extra performance. Although that won't be true at this point and time as the x800 and under cards are PS3 equipped so adding them to a Fudo or above card would hinder the capability of the fudo altogether.
I don't like the master/slave concept either.
Intel C2D E6320 / AMD Athlon X2 3800+
Gigabyte 965P DS3 / DFI nF4 Ultra-D
2GB OCZ Gold PC2-6400 / 2GB OCZ Gold PC4000
eVGA 8800GTS 320MB / eVGA 6800GS 256MB
150GB Raptor / 74GB Raptor
2x500GB / 320GB
OCZ GameXStreme 850w / OCZ StealthXStream 600w