Thanks to those wonderful guys over at XDA-Developers.com, you can enable wireless N on your new HD2.
Apparently, the HD2 already has a 802.11n chip in it, but for reasons unknown to us, it was disabled by default.
The fix is simple, find the registry key HKLM/Comm/BCMSDDHD1/Parms/11nModeDisable and change it from 1 to 0. Voila! Wireless N on your HD2. Rumours are that it also increases your cellular data speed.
XDA-Developers have some other useful hacks, tips and tricks if you’re lucky enough to be a HD2 owner here: http://forum.xda-developers.com/showthread.php?t=583638