Thanks, @steemtrail seems to be very useful.

But what I'd like to see first is to have better tools for community building. How would Steem communities function if there were no monetary incentives? My instinct says that something like Reddit might work best, where the tags are similar to subreddits.

Monetary incentives are great to boost the usefulness of a community, but some communities will work just fine without them. We should finetune the user experience for community builders to be so good that people want to use Steemit even without getting paid. When the user experience is great and there is a monetary incentive in addition to that, we have a winning combination.