Fang Zei said:

I remember a discussion with the vfx guys posted on the official site around the time of the dvd release in which they claimed to have made several dozen changes.

The only change anyone seems to have noticed is the speeder during the Coruscant chase.

Wasn't there also discussion of the sparks on Jango's jetpack right before he's killed in the arena battle? On the commentary track during that scene, Lucas actually expresses surprise to the vfx guys at how quickly they were able to get the changes done.

http://www.dvdactive.com/editorial/articles/star-wars-the-changes-part-four.html?post_id=79063&action=report

edit: I see now that you account for some of the other changes and that they might have come about prior to the DVD. It's really interesting that you note the mechanical hand as part of the digital theatrical release. Has this been confirmed anywhere? It makes sense. I had always figured that the reason for not including it in the theatrical release was the fact that it wasn't ready to go yet, given that it was included on the DVD months later.

The speeder scene change is so subtle that there's no way anyone will know on memory alone, but perhaps it was the same on DVD and digital theatrical.