I believe and hope we are not using any MySQL specific nonstandard
extensions to SQL. If that's true, then supporting a different
database engine should be easy enough.
While it seems likely that Wikipedia software will be useful to lots
of people doing lots of different things, I think that we developers
of the software should continue to think of these uses as secondary to
our central mission, which is the encyclopedia.
In other words, I'd like for wikitech-l to continue to focus on tools
for wikipedia, as opposed to general collaborative authoring tools.
Of course, in many ways, it's the same thing.
--Jimbo