Hot off the presses:
Full Mac OS X 10.7 Lion compatibility
and
Reminder! This will be the final version of TechTool Deluxe!
Edit:
Note to updaters... I had to go through the double-click on the dmg/hit "Open" routine two times before it opened, so don't give up after one try.
Edit 2: I launched TT Deluxe to make sure the update had gone smoothly, and I was pleasantly surprised by a pop-up offering an upgrade to TT Pro, for a short time only, for only
$19.99. (I opted to pay an additional $9.00 + 99¢ shipping to get a backup CD.)