You really need to read what Jay Allen has to say:

I’ve seen more than a few people around the net offering MT 2.661 for download as an act of rebellion against Six Apart and the new MT 3.0 licenses. Most of them stated that they had read the MT 3.0 license and decided they liked the 2.661 license better. Most of them lamented the fact that MT 2.661 is no longer available for download from the MT site.

Well, I hate to break it to you if you’re one of those users (and I’m being kind by not linking to you) but not only is MT 2.661 available for download (and has been for some time, see screenshot), but you are in violation of your preferred license. Or didn’t you read that part about redistribution?

I'd heard about this, but made the error of looking in my Typepad account page instead of the MovableType site account page.

Movable Type 2.661 IS still available. It's hidden away unfortunately; SixApart should seriously consider putting that link somewhere much more obvious if they really consider version 3.0 a developer release. But if you're one of the folks redistributing 2.661, you really need to stop. You don't really want to be a warez site.