If you have an AT&T or Cingular branded phone I recommend you hang on a little longer for your update. But if you have an unlocked Treo 750 (not branded ATT or Cingular) or an unlocked HTC S620 "Excalibur" , X7500 (Athena) or P4350

For the Treo http://www.palm.com/uk/750update 

For HTC phones http://member.htc.com/member/DownloadList.aspx  you will need to register your phone to see the download