There was an ESPN.com report a few weeks ago that the Chiefs had the least amount of money committed to 2010. As of March 5th, we're now in an uncapped year so there are no salary cap implications.
Hypothetically speaking, if there were a salary cap, the Chiefs would still be at the bottom, according to Mike Florio of Pro Football Talk.
Based on the numbers, the following franchises are, to date, taking full advantage of the lack of a salary floor: the Chiefs ($79 million), the Buccaneers ($79 million), the Jaguars ($81 million), the Bengals ($85 million), the Cardinals ($91 million), the Rams ($92 million), the Bills ($98 million).
I believe the salary cap minimum last year was around $109 million or so. There were reports that the Chiefs were one of the last teams to cross that threshold.
A total of 12 teams are currently under last year's minimum if a salary cap were still in place.