Hey,
I'm not sure when you posted, but I was going to offer some suggestions. I am the president of my sorority but I was fundraising at one point as well. Some things we did were:
-worked at a Haunted House. We were the actors that scared people! It was really fun and we made around $500 for the night! So maybe look into that?
-we've done compatibility tests as well. You know in high school when you answer a bunch of questions, send them in and then buy your answers for a $1? Well we did that, and had a decent turn out. Everyone's curious who they'd be compatible with!
-i'm not sure if you guys have MOE's Southwestern Girll, but if you do, they do fundraisers. you can work there for a night and make a % of the profit for that night....
-we like to do "weinies for the wasted". We stand on a busy corner with a grill and sell hotdogs for a $1 to people walking to and from parties and the bars. In a good night we can make $200.
-we've been planning a "car smashing" and received approval from the school, however we ran out of time. We want to get an old car, and some sledge hammers during finals time and charge people $5 for 5 minutes of smashing the car. Obviously there's a great deal of liability connected to this, so you'd have to check with your risk management, but it'd be fun! And a great stress reliever before finals!
-there is always car washs, rummage sales, etc.
Good luck!