All those interested in the MC upgrade can search for answers to their questions in the PDF documentation and/or Help files available on Avid's site. We're just starting to use MC so we can't answer all the questions that are appearing. We can answer some but not all.
For MC 2.8 documentation, go to this page and the following page and look at the docs with the date 5/20/2008.
UPDATE: There are now MC 3 docs with a date of 6/6/08. The MC 3 Readme is currently on page 7 (the two links above are for pages 8 and 9 in the Knowledge Base).
Also, take a look at the attached PDF from Boris concerning OpenGL support required for certain effects. Page 1 is attached to this post. The next 3 pages are in separate posts below.