Hey Aaron,
It's tough. In addition to the whole target school thing (I didn't come from one)... it's much better to be SURE you want to do IB instead of just saying I'll give it a shot. What do you want to do in IB (Corp Fin, S+T, Research?). Do you even want something in front office? middle? back?
I had this dilemma last year when I graduated (in addition to deciding between a Corp. Fin offer and a Audit). What I would do if I were you at this point is check your alumni database and see who can help you. In addition to that join Beta Alpha Psi on campus and any other professional groups (even if you don't think it applies to you)- ie. ALPFA, NABA, ASCEND, etc. You can meet a ton of people which is what it will come down to, as Fernando mentioned in the above post.
Also don't think it's not possible, that's already setting yourself up to failure. Although banks have had a tough year those that are financially sound are hiring intensely because of new business. Some companies that are hiring for Financial Analyst positions within corporate finance are American Express, Abbot Labs (in Chicago though), Unilever, Kraft, etc. Look at their analyst programs. Feel free to PM me as well.
Also if and when you do get that interview for your dream investment banking job. Make sure you know your stuff. Meaning, CAPM, DCF, and doing a full SWOT analysis -- all this on the fly. Be prepared to do case studies as well.