You've already seen it ported to the HTC HD2, and it looks like the recently-leaked HTC Desire HD ROM has now also made its way to two more likely candidates for a port: the Droid Incredible and original Desire. As you might expect, there are a few issues that you'll likely want to consider before diving right in -- there's no camera support yet on either phone, for instance -- but it does look like it otherwise reasonably stable for a beta, and it does bring some of the boot speed improvements seen on the Desire HD itself. Head on past the break for a quick video, and hit up the source links below for all the necessary details.
Update: We're getting word that even the HTC EVO 4G's in on the speedy-booting game now, with a Desire HD ROM as well as an original Desire build from MIUI. They're apparently still half-baked like the other two, missing camera support, WiFi and 4G as well, but if you've been looking for an opportunity to tweak, hit up link number three below.