If we all scream loud enough long enough, maybe Microsoft still won’t listen but HTC lools like they will. According to MoDaCo, HTC will add a close button that really closes and not just minimizes applications to its devices.
Starting with AKU 3.2, HTC devices will have the ability to use the X button in the same way that it works in other Microsoft operating systems. Users will have the option of choosing to either use a simple tap or a tap-and-hold gesture to do so.
Way to go HTC!
Source: Pocket PC Thoughts