lane, sorry to hear about atlanta...my bad, i thought you were in tx. i've heard expedia, travelocity, priceline (in that order) are good for getting reasonable deals...but i'd guess you have to book in advance. (i can't believe they only gave you 1 weeks' notice?! that seems a little unfair.)
i know it's a little too late for ppl in this interview season, but for people interviewing next year...really look into accumulating the frequent flyer miles. (or if you're flying now, enroll in those frequent flyer programs!) american express has a delta skymiles credit card, for example, and they give you a number of miles just for signing up. and there are tons of deals where you get free frequent flyer miles for signing up for certain memberships (but of course, check to see what you're getting into.) i've heard you could actually purchase frequent flyer miles on auction sites, but i don't know if that's legal/still possible. anyway, if you start planning now you can drastically cut your costs next year. i've managed, luckily, to spend close to nothing on the plane trips i've taken so far.