ARS today reported that HTC has released a tool that you can use to unlock the bootloader in some of its Android phones! In an announcement today, HTC said via a posting in HTCDev, HTC will allow the bootloader to be unlocked on every phone it releases going forward, and will also be working backwards to make unlocking tools for phones released prior to September 2011.
Before HTC took pains to lock down the bootloaders on its Android devices which prevented users from rooting them to install custom operating system builds. After some backlash, HTC decided not to lock its bootloaders. However, the ultimate outcome seems slightly different: the text of the HTCDev post reads "we will allow our bootloader to be unlocked for 2011 models going forward," suggesting phones may continue to be locked on release—but now, customers can unlock with the company's blessing.
Of course, "allowing" is different than "supporting." HTC warns customers that unlocking their devices may mean they're no longer covered under warranty. The company also notes that unlocking the devices may cause unintended side effects, including overheating. Phones that support the unlocking tool currently including the HTC Amaze, EVO View 4G, Design, Flyer, myTouch 4G Slide, and the Sensation. According to Gigaom, several developers have discovered the tool also works on models including the Rezound, Vivid, Rhyme, and Thunderbolt.