My sites have been bouncing around in the top 7 or so, everyday for at least 2 months. It has been a game of musical chairs. /*tom*/
http://forums.digitalpoint.com/showthread.php?t=530832 the same to me. how long did it cost to come back?
IMO at least 1 month, but if your site has suffered some kind of penalty maybe never recover the rankings on Search Engines.