Ok, this forever thing is overrated, but you surely won't get Gingerbread via the official channels on your Desire. Here is the official statement:
"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."
So, those guys worked really hard for a few months but they came up with nothing. It seems running Gingerbread on the Desire will compromise the Sense experience.
HTC Desire runs on a 1GHz processor, has 576MB RAM and 512MB ROM. HTC claims the memory is not enough. Well, HTC, the Wildfire S has a 600MHz CPU, 512MB RAM and 512MB ROM and it CAN RUN Gingerbread. Even though, the Desire has a higher resolution screen, it's still not enough to convince us HTC has done everything in its power.
We are sorry, Desire users, but it seems you will need to upgrade with a newer device or get some unofficial Gingerbread ROM.
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