thanks for the reply mikel,
yep I know that the forum looks pretty empty with all those categories and topics, however we hope to have them populated in a short period of time by launching a series of campaigns.
Although for the beginning the budget will be limited to ~$200/month we hope that by launching the monthly photo contest, together with paying some experienced moderators to start a few threads the users/posts will start to come.

Let me know if you think there's anything else I should do to jump start the whole process.