Android HTC Phones Unlocking

HTC Dream
HTC Magic
HTC Hero
HTC Tattoo
HTC Legend
HTC Desire
HTC Incredible
HTC Google Nexus One

All these phone can be unlocked by Factory unlock codes Only. No Direct Unlock Solution or Free Unlock solution for now.
Some of these phones can be unlocked by JTAG, Connect Jig to phone
Read DUMP area. soft will read/calculate code.
Some phone supports code reading via USB. Search for it for more info.