Odds are not too bad that someone at the LCC Conference in the Netherlands has heard of toki pona & that is only 1 month or so from now:http://conference.conlang.org/lcc4/index.php
Using google analytics data from my tokipona.net fan site:
In the US, there are toki ponists in NY, CA, TX, FL, and few elsewhere. in other words, evenly distributed across the entire country.
Here are the top 10 countries for visitors to my site:
1. United States (A bit skewed since the site is toki pona & English)