Finding my lost cat!!! need help!

So i my cat went missing Saturday night, of 5/10/08 and its still missing
I had a few friends over which i wasn't suppose too, (parents out of town) and they brought some stuff..
so anyways some stupid bitch probably kept the front door open, even though i told everyone to always shut the doors.

Describing the cat, house cat, its big, not fat but extremely puffy and white. easy to spot. and also very dumb, if cats can have a disorder, like humans (retard) then I would categorize my cat as one.  So it would not be able to find food, or water (my guess) and it doesn't know its way around my neighborhood. When it does get out usually it sticks near the house, around our yard, which it is familiar with this is not the case this time which really worries me. Plus, at my get together the girls were messing with it and scaring the shit out of it (which i told them to stop). So i think it went somewhere in my neighbor hood that its not familiar with and cant find its way back.

Problems. and why I need to find this cat.
-I dont actually like this cat when its around, im allergic to it and its stupid so not any fun
-BUT my mom loves this cat, it cheers her up even when she is pissed at me for no reason. It really makes her nicer and happier person. The only reason my mom left town and left the house to me is because her mother is dying and she lives in Japan, so she is already extremely sad, sadder then I have ever seen her. And on top of that I dont need her 2nd most loved thing, the cat to be missing or dead. This is all ironic because she told me not to have a party.

So basically Karma bit me strait in the ass, and i am sad. I am not going to school, or sleep. I must find him.
So i need some ideas if you guys have any, my cat doesnt really know its name so its not gonna work that well.
+karma for good advice, and I really need your help NS. The clock is ticking, its already been 24 hours and  its getting to the 2nd night, its cold and raining partly to add to it. !!!!!