Agreed – looks like a fantastic product! Seconding the question about MySQL support. I use MySQL for everything. I don't want to add extra gigs of RAM to my VPS just to run an instance of PostgreSQL for Commento. Postgres is much slower than MySQL in simple applications and uses a lot more memory per connection. MySQL is also more popular and more people know how to use it and tune it properly. Postgres is probably more stable, but I don't care about that in a commenting app.