Just decided to have some fun and went with multiple databases tonight. Everything ran pretty smooth other than some permission problems that required a little ssh action, but good. The one issue that I did have was with the move-blogs.php script. In order to get my database creation structure, I had to do the following:
$newdb_prefix = 'database_';
Simple enough. Problem was with line 102(ish):
// this is a global table
$this_blog_new_db = $newdb_prefix."_global";
It was having issues with the script trying to call database__global versus database_global. I had to get rid of the underscore before global and it worked fine.
Just thought I would see if others had issues or if it was indeed just a typo? Version .62