My first impressions of TFSA have been very good, it compares well with some other forums I browse on regularly.
The common thread on all successful forums is a core group of members prepared to help others, and share their expertise, I am regularly staggered by the effort Bogleheads members go to in assisting complete strangers. It has a USA focus, where the financial system is very different to here, but they discuss a very wide range of topics.
The forum is strictly moderated, and also has a very comprehensive Wiki.
My interests are property and stockmarket investments.
Locally, Paddocks have an excellent sectional title training facility, with active website, Facebook page and consulting club (a closed forum for paid subscribers only