Genesis
Dreamcast
Gameboy
Gameboy Color
GBA
DS
DS lite
Gamecube
Xbox
360
Wii

Gameboy
PS2 and PS3
PC (ok everybody got one, but it is a gaming system after all)
Coming soon
PSP

Have but is broken
Master System
SNES

In the order by which I received them.

NES
Sega Genesis
Sega Nomad
N64
XBox
PS2
PC
GabeCube
XBox 360
PS3
Wii
Nintendo DS
PSP
Laptop

Consoles:
Atari 2600
Famicom
Super Famicom and SNES
Playstation
N64
PS2 Slim
Gamecube
Wii

Handhelds:
Game & Watch (Manhole, Parachute, Oil Panic, Greenhouse and some more I forgot)
Gameboy
DS Phat

Here's what I got:

Consoles:

Super Nintendo
Nintendo 64
2 Gamecubes
Wii
Sega Genesis
Sega Saturn
Dreamcast
Playstation
2 Playstation 2's

Handhelds:

Gameboy color
2 Gameboy Advances
2 Gameboy Advance SP's
2 DS's
Sega GameGear
PSP

Consoles:

2600
NES
Master System
SNES
Genesis
Saturn
N64
Dreamcast
Gamecube
PS3

Handhelds:

Gameboy
GBA SP
PSP

PC specs (coming in December :D)

Geforce 9600 with 512 Megs DDR3
Pentium Duo @ 2.2 GHz
2 gigs DDR2 RAM @ 667 MHz

Consoles
Fairchild F Channel
Atari 400
Atari 800
NES
SNES
Genesis
Sega Saturn
PS1 (4 of them)
N64
Dreamcast (2 of them)
PS2 (5 of them)
Xbox (3 of them)
Gamecube
Wii
Xbox 360 (2 of them)
PS3

Handhelds
Gameboy
Gameboy Color
Sega game gear
Sega Nomad
Gameboy Advance
NDS
NDSLite
PSP

Somebody has the VIC-20?

Home Consoles:

Phillips G7000 Videopac

Atari 2600

NES

Sega Master System/II

Commodore 64

Sega Mega Drive

SNES

Sega Saturn

Amiga 500

PSx2

N64

N64 Pika edition

Dreamcast

PS2

Gamecube

Xbox

Wii

X360

Handhelds:

Gameboy x2

Gameboy pocket

Gameboy Color

Gameboy advanced

Gameboy advanced SP

Gamegear

DS

DS lite

PSP

That's what I got :D

ps3 , ps2 , gamecube, and mex box :P