Use it as a housing for your PS3 power supply for example.
I'm trying to get the internal temperatures from my old fat 60GB launch model as low as possible, since it has suffered from YLOD quite a few times already.
Watercooling was my first modification and now I also made the power supply external.
I had one RRODden Xbox360 lying around and decided to make some use for it.
Pics from the internals:
On/off switch also controls the water pump and the fans are temperature controlled (fan controller ripped from an old PC power supply).
The setup:
Power up/power down video:
Now the box has full RRoD
__________________
PS3 80GB fat 3.55kmeaw, PS3 320GB slim 4.21, PS2 fat Free McBoot & OPL + 250GB internal, 2xPS1 (SCPH-1002), XBOX360 fat JTAG 2TB, XBOX360 slim RGH 250GB, PSP, PSPgo, PSVita, NDSlite, N3DS, N64