HTC has announced via Google+ that it has added more devices to the bootloader unlocking tool that it offers up to developers on HTCdev. The newly added devices include the HTC Hero, Legend, Droid Eris, myTouch 3G, and myTouch 4G. If you're a fan of unlocking your device to run unofficial Android ROMs, this will be good news for you.
I think most of us will be surprised to see a couple of these devices included in the unlocking tool, smartphones like the Hero that has been around for a while, for instance. It's nice to see HTC isn't leaving these people using its older Android devices out in the cold. I'd also wager that there are more than a couple people out there that still have these older devices around even though they've upgraded to newer phones.
By adding devices to the bootloader unlocking tool, there'll undoubtedly be a number of people tweaking the old handsets because they don't fear ruining them or voiding the warranty. You should be able to use the updated unlock tool now.