I gave today a lecture about how to make MOSS accessible at Microsoft's open house.
Those of you who were there, I apologize for being so brief and fast, believe me I had enough content for at least 2 hours...
How ever, I'm trying to set some "hands on" lab in some form, and I will update if and when it'll take place.
In the meanwhile, here is the presentation from today, in Zip file. Note that the presentation is written in Hebrew.
Making MOSS 2007 accessible - presentation.