Hi,
Not sure where to post it, if anywhere. I just finished a conversion from a greymatter blog to a b2evoltution 1.8 blog and it works, though there were some issues.
I quickly spend a few minutes writing down what I did, so others might have a little less trouble with it, so just FYI
http://www.odd-e.com/articles/2006/convering_greymatter_b2evolution.html
Bas