Based on a twit by Tom Curran who posted a snap shot of the proposed salary cap numbers for for 2011 through 2014 the cap would have been $114 million in 2011 and moved up by $7 million in each year there after.

Now, if everyone remembers a few months ago Pat Yasinskas guesstimated the 2011 cap would be in the range of $140-$150 million.
http://espn.go.com/blog/nfcsouth/post/_/id/17742/nfc-south-2011-salary-cap-figuresBased on 14 teams having committed over $100 million towards the 2011 cap already part of the problem with the NFLPA and the owners would appear that there were going to be more then just a handful of veteran players being cut/released to make room for rookies and teams to effectively maneuver to get under the hard cap number.
So the Bucs who reportedly would have had nearly $60 million in cap room would appear to be in the $20 million range should the owners last offer have been excepted.