I just got my N9 and can't find a decent mind-mapping program. HiveMind is close, but I couldn't get it installed yet. A program called Flo also looks intriguing. Google Hivemind and Meego or Flo and Meego to get as close as I got. Note that HiveMind has a fully viable Maemo version available and I think someone who knows what he is doing could comlplete a usable version for Meego in half an hour.