I know that Bill Hunt's (TheDigitalBits) take on the blu-rays has been linked to already here, but I've been kinda curious what Chris Gould from DVDActive would post about them eventually.

He did the first set of in-depth comparison shots of the SE changes I ever came across (see their home page), and has now gone into some detail on the audio/visual aspects of the TPM and AOTC blu-rays so far -

Overview - http://www.dvdactive.com/reviews/dvd/star-wars-the-complete-saga.html

TPM blu-ray review - http://www.dvdactive.com/reviews/dvd/star-wars-episode-i-the-phantom-menace3.html

AOTC blu-ray review - http://www.dvdactive.com/reviews/dvd/star-wars-episode-ii-attack-of-the-clones2.html