Android 2.2 went live for Nexus One, but his "brother" from Europe will also get the Froyo soon. It's possible this update to come 23rd July, so you will not have to wait too much until you can have it if you own a Desire. The guys from PhAndroid spotted Froyo on XDA-Dev, a forum for developers.

HTC Desire, codenamed Bravo, is available at many European carriers at about $250, depending on if it's a deal involved or not. It has a 5MP camera, packs 512 MB RAM, is powered up by a 1GHz Snapdragon processor and has a 3.7 inch AMOLED touchscreen.

Source: MobileCrunch