Is there any reason to keep these as separate tags? I'm inclined to think that [repair] should be turned into a synonym of [maintenance]. While the words have slightly different meanings, they're used interchangeably and I don't see a benefit to keeping them separate.
Thoughts on this, anybody?
The community has spoken. I'll start retagging questions, and anyone with the rep, please feel free to chip in. I'd like to have this done before the site launches early this coming week.
At the moment, as per this page, we're maintaining the tags separately. If the merge suggestion ever becomes more popular, we can merge the tags at that point. (I personally would prefer that since, even though it is a less precise tag, it'd be easier to maintain.)