here is what i quoted from the spec sheet of the Desire from HTC Website (not any other website that claim that Desire should have multitouch)
Type: AMOLED capacitive touch screen with pinch-to-zoom capability
so why complain about something that isnt even mentioned in the spec sheet, nor it is supposed to be there.
its like saying "OMG why the desire doesnt have a projector built-in? it sux big time"