For what he brought to the Pack last season, I'm giving up a 7th in a heartbeat. And considering the FA rampage TT has gone on this year, the Pack is not likely to get any compensatory picks at all next year!
Seriously, this is a pretty low risk signing. They can still bring in Tolzien, and if they like him better by the end of camp they can let Flynn go - I assume his signing bonus is sub 6 figures, so the cap impact would be pretty minimal.