Star Wars PT DVD - How many different versions are there???

Hi,

I'm just curious how many different versions of SW PT DVD are there?
I'm not talking about Widescreen vs Fullscreen kind of differences, but I am referring to actual footage differences (e.g. the SW OT differences between Pre-SE, 1997 SE and 2004 DVD)

Cos I know Lucas has this rather irritating habit of editing his movies without telling anyone, so I was wondering if there has been any other versions of PT movies besides the DVD released back in 1999 for TPM and 2002 for AOTC.

One more thing, SW PT DVDs are currently out of stock, and a new stock will be arriving in Mar 05 (source: Amazon.com). Will these DVDs be identical to those released back in 1999 and 2002 respectively?

Many thanks


Strilo edit: We have an Official TPM DVD Discussion Thread for things like this.