dude, those disposable cameras make low quality, small useless pics.

if you want to keep it under $300, check these out at cnet or amazon:
Fuji FinePix 5200
Canon A610 or the A620

both can be gotten under $300 and take pretty good pics. my walking around camera is the A620 and it does a great job, and i was reviewing a site yesterday that left their camera info in their pics. the pics were big and pretty darn good and they were using a FinePix 5200.