Widely blogged about, but I wanted to mention it here.  Hilton HHonors is offering a pretty decent elite status deal if you carry a Visa Signature card in your wallet.  Just go here, verify your card #, and then register your Hilton HHonors #.  Hilton will upgrade your status to Gold through 8/31/11.  If you stay 3 times between now and 8/31, they’ll extend your Gold status all the way through March 2013.  If you’re already Gold or Diamond, they’ll give you 5,000 bonus points.  Do it!