I'd like to setup two independent Mediawiki instances (at different URLs) on my dreamhost site. These wikis would be addressing fundamentally different needs, so it would be nice to keep them separate. I realize this question has several levels. Do you share Mediawiki servers, database or allow them to be separate, etc. I'm actually fairly neutral on all these questions as long as I can easily separate the two sites and move one to another server, in the future. Any suggestions? Thanks!