Hey... came across a deal on a pretty high end resort hotel in Nashville (4-star user ratings here on tripadvisor) and it looks like it's open for use as there are still rooms left in this block (it just worked for me). The eligible dates are June 1-4 (it might work for saturday, may 31 too, but I didn't try that).
Rates are usually $219-$284. But if you call the Gaylord hotel directly @ (888) 777-6779 and identify yourself with the "Information Builders Conference" you can get a room for $167/night. I think this expires this week (Thursday - 5/8).
This place is supposed to be pretty impressive. I'll write up a review after my stay.