For info on the latest community building tools, check out the February issue of Entrepreneur.com. You'll find an article by Amanda C. Kooser called "Make your new site social" with a sidebar on "Networking Tools."
She mentions four that are worth a look. They are:
1. Google Friend Connect This is in beta. No technical knowledge needed.
2. Ning Very popular, lots of great features
3. Wetpaint Wiki based
4. Yuku Adds forums to your website
If you determine that an online community will work, start small and see how your audience responds. The key is to make everyone feel like participating. When a few people dominate the conversation, it's not very rewarding.
Note: I've used Ning and recommend it highly. The others look interesting, but I haven't built a community with them.