HTC has done a decent job with updates, but not for those who own the HTC Desire. We have some bad news for them.
Unfortunately the HTC Desire does not have enough memory to update itself to Gingerbread as well as keep the HTC sense.
Here is was HTC UK said on their Facebook page:
Our engineering teams have been working hard for the past few months to find a way to bring Gingerbread to the HTC Desire without compromising the HTC Sense experience you’ve come to expect from our phones. However, we’re sorry to announce that we’ve been forced to accept there isn’t enough memory to allow us both to bring Gingerbread and keep the HTC Sense experience on the HTC Desire. We’re sincerely sorry for the disappointment that this news may bring to some of you.
At least there is still the option for rooting and custom ROMs.