I'm currently in the planning stages of building a custom gaming rig using a modified Atari 2600 as a case. I'm planning on using a Micro ATX AMD board, slim cd/dvd burner, laptop hard drive, a few fans and a single low profile graphics card (probably an 8600GT). Given all these components, is there a laptop style (DC to DC power supply with an AC adapter (power brick)) capable of providing enough power to run this system? If so, does anyone know where I could get it? For cosmetic reasons, an external power supply is out of the question. For performance reasons, a Mini ITX board is out of the question.
Thanks!

Never heard of anything of the like... However here's a different approach to your plan. Drop the planned case and get one of these:

Antec Aluminum Veris Fusion Black 430 Micro ATX Media Center / HTPC Case with IR receiver - Retail

http://www.newegg.com/Product/Prod [...] 6811129030

To me it would look great in a living room and if you pick the right optical drives nobody would notice that it's actually a PC that you have on the shelf. On top of that you can fight some decent components that would make for a decent gaming machine instead of that 8600 that you were planning to get, since this one already comes with a silent, powerful power supply that can put 31A on the 12V rail (If im not mistaken it's similar to a NeoPower 430W, which is a very silent unit, I can vouch for the neopower series since I own two Neopower 500W)

The only "bad" thing is that the two fans that come with the case are not all that silent, but that can be fixed by buying 2 good silent fans like Scythe S-flex or Noctua.

Here's a review of the case and better pics:

http://www.techpowerup.com/reviews/Antec/Fusion/1.html

And you can put a good gaming machine in there like this:

GIGABYTE GA-G33M-S2L LGA 775 Intel G33 Micro ATX Intel Motherboard - Retail

http://www.newegg.com/Product/Prod [...] 6813128085

Intel Core 2 Duo E7200 Wolfdale 2.53GHz 3MB L2 Cache LGA 775 65W Dual-Core Processor - Retail

http://www.newegg.com/Product/Prod [...] 6819115052

EVGA 384-P3-N853-AR GeForce 8800GS Superclocked 384MB 192-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video

http://www.newegg.com/Product/Prod [...] 6814130333

Crucial Ballistix 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory - Retail

http://www.newegg.com/Product/Prod [...] 6820146565

Scythe S-FLEX SFF21F 120mm Case Fan - Retail

http://www.newegg.com/Product/Prod [...] 6835185006

You'd have to pick an appropriate optical drive to match the case and maybe an HDD if you don't have.

Use a laptop motherboard and psu. Problem solved.

roadrunner197069: I've thought about using a laptop mobo but decided against it for a number of reasons.
- A good one is very $$$ compared to a micro ATX board
- No PCI Express x16
- Generally, less performance, more expensive and less upgradeable

emp: That is a nice case, but I'm sticking with the 2600. I'll be modifying the case to make it larger and more breathable (but not large enough for a conventional PSU).

Get yourself a plug in power meter and see what the power consuption is on a standard PSU, then take a look at something like these:

http://www.mini-itx.com/store/?c=10

The 200W one should do, or even the 120W might just do it so long as all your components are chosen for minimum power consumption.