Ah yes, my second favorite building in Chicago. :) True, its a bit soft focus wise, but I like the angle you took the shot from and the exposure is dead-on. I don't know what imaging software you own, but if it has something to distort the photo a little bit, you can also remove the lean of the building as well. Still, nice shot.
Nice buildings, but like Jeff said, a little soft. Looks like camera shake more than anything else. I bought a cheap Vivitar tripod a few months ago at Wal-Mart. $12.95+tax I think. Much, much better than nothing and surprisingly serviceable when used with the self timer. No more excuses (smile from me)!