Hi Margaret,
The easiest way to build a network on BuzzBuzzHome, especially across regions, is to get active wherever you can on the site! Post on the forum and "follow" projects that you might be interested in. If you come across a particular realtor that sounds interesting to you, "follow" them as well and see what they're saying about real estate on the site.
We are currently expanding across the US, with extensive listings in New York City, Miami, Boston, Chicago, Washington DC, Houston, Austin and San Antonio. That said, our expansion is rapid so stay tuned for listings in many more cities very soon!
Kiyoko