If you pull down the notification bar and tab over to quick settings there is there a new toggle for enabling and disabling 'Power Saver'? Or was that always there before and I'm just blind?
I don't use power saver, it just caught my eye because it is green and all the other icons are/were blue except the settings shortcut.
---edit---
I know it was not in the original release on release day, here is a photo from a release day review that does not have it included.
I still wish there was a display brightness slider or toggle in that shortcuts tab. I've been pining for that since the Evo 4G release, I hate having to install a third party application for something so elegant. I'd rather have a brightness setting slider than an unused Power Saver toggle.