Hi - First HN post, but I hope I'm using this resource correctly?

My Craigslist competitor focuses on smaller groups and then aggregates those groups for critical mass (users subscribe to as many groups as they want). The idea is to let people trade within those communities, building those relationships.

Landing page: http://www.adcommunities.com

As I said... no traction, but here's a view with just a few ads: http://washington.adcommunities.com

For the hackers:

Web: .Net / IIS Rerouting / Lucene.Net load balanced on AWS/EC2

Backend: PostgreSQL / Sphinx Search on Linux

Thanks for any feedback at all!