So, here's the tally: as of June 14th, there's just "not enough memory" in the Desire for Gingerbread to run properly. As of the 15th, however, there is. We won't pretend to understand what changed so drastically in the past 24 hours, but what is clear is that the aforesaid handset maker is listening to its most demanding of users. While it's safe to assume that the Average Joe (or Jane) wouldn't be able to recognize the difference between Android 2.2 and 2.3, folks clamoring for the update seem to have coerced the company to make things work. In other words, it looks like the update is back on... now it's just a matter of making it run well. Kudos HTC, and godspeed.
Update: Turns out that HTC's engineers will "cut select apps" to enable the Gingerbread update.