lammert - 2:54 am on Oct 21, 2010 (gmt 0)
Hi keyblast, first of all Welcome to WebmasterWorld!
Sorry to hear that a number of your sites have been deindexed. If you think that hacking your sites has caused this, your first step should be to logon to Google Webmasters Tools. If Google detected anything suspicious with your sites, there may be a warning visible there.