I LOVE how they don't seem to have changed much as far as the layout... there is a chance full-coverage 3870 blocks will fit the 4870, which would make many of us really really happy. Also the volt-mod is already figured out, as its the exact same as for the 38xx's.
Full-covers are iffy, since the memory chips are in a different location for the 4-series. The block might go on okay, but if you're going for max memory clocks, you'll want at least a little bit of cooling on them.
i7 2600K | ASUS Maximus IV GENE-Z | 580GTX | Corsair DDR3-2133
I still think AMD/ATI have a real shot at taking the overall video market by storm with their new releases when you consider $$$ to performance ratios. Nvidia is just too expensive and if the 4870 beats out the GT260 (and it looks like it can/will) for $100+ less dollars, ATI will not need to beat the GT280. I believe ATI has been too underated and Nvidia has been too overrated. Reality is going to hit Nvidia very hard in the wallet. GT280 just doesn't look to be enough to be worth the extra $$$ over the 4870 X2. They are going to have to make certain it is selling for $499 or under to be competitive. Nice twist of fate here!
But Nvidia is in a better position to weather a price war than AMD/ATI. They have capital to spare since they have dominated the market for so long. They can sell cards at a loss to compete with AMD/ATI and they will be smarting because they haven't been making money at all.
That card is pretty sick. FXvideocards ships to Canada as well, so you can pick up a Sapphire for $179.99, or a Visiontek for $189.99. I've had pretty good experience with them in the past, so they're legit. (I'd personally go with Visiontek due to the better warranty)