WOW! And I thought I was the only one to ask stupid questions!!!

No wait.. I AM pretty much the only one here who asks stupid questions....

Meh, anyways. There are some good sites out there for MAME Roms as well as other MAME and MAME like stuff. Nothing like getting to play the classics, from Stella (The Atarti 2600 emulator) through Project64 and beyond. I would recommend that you look into Shell Shock, a PC game made with the "help" of people here as well.
EDIT: Do NOT ask on the forum where to get MAME ROMS or any other copyrighted ROMS. If you do, Saint will cry (and ban you). Well, you CAN ask, but the request will most likely be deleted due to obvious reasons..... (God created Saint and PM, I would suggest using the later)