We're paraphrasing here, but recently, Andy Rubin of Google/Android said that the pace of innovation for Android had increased by two-thirds (it's gone from 18 month blocks to 6 month blocks). It seems to be the case that Android developers are working at light speed as well. It's only been about a week since the HTC EVO 4G was rooted (just days after developers got their hands on the device at Google I/O), and now AndroidCentral is reporting that some developers have been able to run Froyo on the device.
Below you can see a video of the EVO 4G running Android 2.2. There's no directions on how to perform the upgrade just yet, but given the excitement surrounding the device, I imagine they'll follow shortly. Who plans on serving up a helping of Froyo on their EVO 4G?