I tried the bootstrap process posted on the wiki, following it to the letter. When I started 2.0 it found all the right files, worked part way through them, and then started throwing exceptions related to wrong date format or something.
I stopped tomcat, deleted folders in the 2.0 alf_data directory, copied the folders in the 1.4 alf_data directory into 2.0 alf_data, started 2.0 and it is now working "fine" and *appears* to have preserved the 1.4 repository, users, etc. (Of course I am not sure, which makes me nervous, and this is clearly not the basis for a migration strategy I would feel comfortable using with a real installation.)
So:
1. The instructions on the wiki are apparently not correct, or at least not complete.
2. They are apparently not needed, at least for a vanilla install, and
3. I do not understand why there is not a set of complete, well-vetted "For Dummies" procedures to help newbies through the Top 20. Many of us are installing to demo for companies and if we cannot even get past the basics using the catch-as-catch-can instructions and scattered advice from the Alfresco Team, it is unlikely we would feel confident enough in the Alfresco Team to move to a paid service license.
Does this make sense to anyone at Alfresco or am I expecting too much? I posted a similar observation a week ago and got no reply to it. Weird.