If you own a HTC Desire HD, you ought to check out the new RCMix3d Bliss ROM by the RC Team which includes the latest Sense UI 3.5 thanks to the HTC Bliss Devs. There are some issues with this ROM though - bluetooth and the camera doesn't work just yet. They're working on it but if you're all right without the camera or bluetooth working, it might be worth checking out. Head on over to the source link below to check out the RCMix3d Bliss ROM for HTC Desire HD.
Source: XDA Forums