The wait is over -- the fellows behind Unrevoked have released their "forever" tool. While we're not going to get into specifics (you can read those, and you had better, at the source link) what this tool does is unlock your Evo or Incredible's firmware -- forever. As in even if you accept an OTA update, it stays unlocked. According the the Unrevoked team, this is a permanent patch.
Be aware, there is always the potential for problems, even big ones. Be sure to read everything and understand before you download and install this. Having said that, I've done it and had no issues, and so have a few others. No go have a read and see if this one is for you, and check out the screenies after the jump. [Unrevoked] Thanks Bret for the screenshots!