Looks like the rumors are true, folks -- the Evo 4G update that's coming down the pike may well be fixing the 30FPS graphics issue that's been plaguing us all from the start. We were slipped the above e-mail (and it looks like Engadget got one, too) that shows the rumored 3FPS and GPS reboot fixes (that strangely are missing from Sprint's update list).
But wait, there's more. The leaked e-mail also shows an update to the HTC Hero. No, it's not Froyo (and it won't be), but you are getting fixes for GPS reboot and sluggish dialer issues. So you got that going for you, which is nice.
Sing out in the comments if you've gotten either of the updates yet.
Update: Unrevoked's got video of the fix in action, apparently. Check it out after the break.