Nvidia has just released their GTX590 a few days ago from what I can tell, and there are 4 EVGA packages consisting of different card combinations. You can go from the single air cooled solution starting at ~$750 all the way to the unnecessary water-cooled dual graphics bundle for ~$1,800 USD. Note: the GTX590 has 2 GTX 580 GPU'S! Here's the catch: both GF 100 GPU's are downclocked a little, but the mere fact that there are 2 of them more than makes up for their performance loss. Here are EVGA's 4 GPU solutions below. As you can see from the source pages, all of them include a T-Shirt and a custom mouse pad!
Note: these are actually from EVGA's CLASSIFIED series of cards, which feature from what I can tell nicer packaging, and maybe other things that I'm not currently aware of.

Edit: I just wanted to clarify, that if you put 2 of these cards in SLI mode, this is actually quad SLI because each card has 2 GPU's so 2 + 2 = 4

The specs are actually the same throughout the cards as far as speeds/cores/etc. goes, but the dual combo packs actually do not feature the mini-display port.

Specs:

- Part Number: [this varies]

- Core Clock Speed: 630MHz

- CUDA Cores: 1024

- Memory Clock Speed: 3456MHz

- Memory Bandwidth: 331.7GB/sec

- Shader Clock Speed: 1260MHz

- Bus: PCI-E 2.0

- Interface: DVI-I, DVI-I, DVI-I, Mini-DisplayPort (Again, only DVI-I, DVI-I, DVI-I for the dual card solution)

- Product Warranty: Limited Lifetime warranty upon registration

- Product Length: 11in - 279.4mm

Here is the single air GPU solution EVGA has to show priced at $729.99 MSRP:



Here is the Dual air (already dual GPU'd) graphics card solution priced at $1,429.99 MSRP:



Here is the single water cooled graphics card priced at $879.99 MSRP:



Here is the Dual water cooled solution priced at $1,729.99 MSRP:



I don't think you can go to best buy and pick up one of these locally, sorry .

Sources:
http://www.evga.com/articles/00621/
http://www.evga.com/products/moreinfo.asp?pn=03G-P3-1598-AR
http://www.evga.com/products/moreinfo.asp?pn=03G-P3-1598-A2
http://www.evga.com/products/moreinfo.asp?pn=03G-P3-1599-AR
http://www.evga.com/products/moreinfo.asp?pn=03G-P3-1599-A2

Wow, I wonder what kind of power supply and the like does that require?

Also I know about the lack of video card choices at retail stores. Over here the most powerful cards are generally 256 MB video memory. X.x

I'll stick with my trusty old Windows 2000 box. I've got no need for new video cards.

Personally I'M fine now. Sure, SCII would look cooler at ultra shading settings, but it still looks awesome at medium shading with everything else maxed out. Plus sometimes I still play Starcraft Brood War anyway.

How this came to be:
One day, at Nvidia, two engineers are racking their brains, trying to figure out the missing ingredient, when one of them has a breakthrough.
"Dude, I know what this thing needs!"
"What?" asks the other engineer.
"More overkill!"

It's not about need, man, it's about want.
Not kidding. At all.
The only people who really need that much power are those in the rendering industry, like Pixar. It doesn't matter for games, because no sane coder is going to write something that needs that much power because that would prevent it from being used by anything/one else.

But there is another, far more important reason they created this thing: just to create it.
Science for the sake of science is how we got here today, and that applies to computers. Without that, Omni wouldn't exist.
Also, notice the trend of 3.something GHz clocks and multiples of processors? This is because the chipmakers have hit a wall: they can't make the transistors any smaller before quantum mechanics starts messing with things.

And that's what keeps the economy going.