Not many. Kirwan at nfl.com has an article on it... basically, everybody has more cap room than they're used to, thanks to the new CBA, so far fewer have to cut for cap purposes. Evidently, there's going to be another big cap bump next year, so a repeat of the effect is in the works. I'm assuming at some point the cap levels off, at which point the inflation will catch up, and people will get stingy again.
(I personally thought there would still be more, and maybe more are coming, but that just goes to show I'm an amateur at capology, at best.)
PFnV