HTC EVO 4G getting over-the-air update next week?

Word on the street is that Sprint and HTC are hard at work on a software update for the EVO 4G that would start rolling out on the 28th, next Monday. If true, this would be the phone's second update overall -- the first was pushed in concert with the launch in order to fix microSD issues -- and like the first, this one is designed to squash bugs, it seems. We're told this one will "enhance" WiFi (whether that means 802.11n will be enabled, we're not sure), fix some Exchange issues, and improve battery life, all of which would be welcome changes. Of course, a Froyo update would be even more welcome, but we're just going to have to keep our expectations in check here for the time being.