Toki pona conversations are on going on the forums, tokilili, twitter and a little bit on facebook. There usually is someone on IRC, but I wouldn't know, I don't like IRC. The active community keeps moving to the latest fad social network. For example, if you were to look at livejournal, you'd think both toki pona and English were abandoned languages, given the drop off in the usage of both of those languages there.
The output (text, projects, etc) of the community has dwarfed jan Sonja's output for the last 8 years. Short of a protracted recession in Canada with high unemployment rates, I don't see jan Sonja jumping back into conlanging. (But that is just pessimism, I don't have any thing else to support that)
Compared to Na'vi & Klingon, toki pona is small potatoes.
My guestimate is that there have been 50-100 people who have invested non-trivial time into toki pona, over the last decade and at any one time there is five to ten people who are actively doing something in toki pona.
tenpo ale la sin li lili lon ma pi toki pona. Every day is a slow news day.