Evo-froyoGet ready to keep checking for updates on your HTC EVO 4G, everyone. The big one is coming!

According to some leaked Sprint documents obtained by Engadget, the long-awaited and highly-anticipated Android 2.2 update will be rolled out tomorrow, though possibly only to select users given that the official PR announcement that will be issued tomorrow morning will state the update will actually be pushed out next week. Either way, Froyo is moments away!

In addition to the standard 2.2 enhancements, the EVO will also be treated to several extra features like camera rotation in all four directions, new widgets, the ability to use the camera's LED for video capture, and improved 720p video recording.

If you're one of the lucky ones to get the update tomorrow, let us all know so we can try to track you down and steal your EVO until ours gets updated too. Thanks, Will!

Update: And it's official. Sprint will be pushing out the update in waves beginning on August 3rd. If you can't wait to receive the update notification (and who can?), the carrier is actually letting EVO users initiate the upgrade themselves through Settings -> System Updates -> HTC Software Update. Thanks, joepennant & Charles!