Hi Karissa <waves wildly!!!!>
If you haven't already you know I'm going to suggest asking your recruitment adviser, CNS and MRC for help with theme selection! Why reinvent the wheel when it might already be out there for you to adapt to IIA?
Other things to think about include what type of atmosphere are you trying to set for that round? Are you going for light and humorous, fun and friendship or a more serious message? Will this theme be for Open Houses, Philanthropy, or skit night--or used to tie the entire week together?