There was a post on here a few weeks ago about a new Excel (I think) in LEX. Alltech has a KA300 and a LR45, RJ Corman has a LR55 and CL604, there are a bunch of 500 series Citations there as well as a few Turbo Commanders and King Airs. There is a company called Global Aircraft Charter (or something like that) based at TAC-Air, they have a LR55 and a GLF-2. There is also a Beechjet there, but I have no idea who owns or operates it.
As far as Louisville, there are lots but not many that I know of hiring. I think Kosair was looking for a C90 pilot a while back though. YUM is always looking for somebody (so it seems), Humana, and a TON of smaller companies with Navajos/King Airs/Citations/misc light jets. Aircraft Specialists at JVY is always looking for Lear or KA300 pilots, but thats usually because they've pissed off their current pilots to the point they've quit.
Hope this helps...