HTC's latest and greatest, or for some a marginally improved Desire, slated for release in April/May has found its ROM leaked online. This is one of the many ROMS leaked in the last couple of weeks including the leaked ROM of Wildfire S and a Gingerbread ROM for Desire HD.
The Desire S is suppose to come with Android's latest version called Gingerbread with the new version of HTC's Sense UI on top. Currently the ROM is only available for developer use which means it's not compatible with the original Desire right now. But the developers at XDA are probably already on their way to port this to the original Desire so its only a matter of time before Desire owners get a taste of the new Sense UI.
Source: XDA