ok, Kereru so...
I too am eagerly awaiting a documented upgrade procedure to go from 2.x to 3.x. My brain hurts from trying to figure it out without a clearly written set of docs.
becomes...
I'd like to be able to run a script which migrates from version to another and not be messing with replacing statements, variables and function calls
There is never going to be one script that will handle this so I wouldn't wait around for one or ask for it on the forum/groups. Sounds like you plan to start a fresh is the right one or I'd advise you don't upgrade at all - after all is it broken?
For me it is huge hassle but I this the docs are good and the benefit of the 3.0.1 worth the effort.