Taylor Mingos from Shoeboxed.com and Aaron Houghton from Preation got together and launched DowntownDurhamStartups.com. The site's goal is to feature startups in Durham and across the Triangle and provide resources to entrepreneurs.
I think this area has needed something like this to help showcase the depth of the region. It helps market the companies to people outside the area (VCs, people thinking about moving here, companies thinking about re-locating). I also think it is important to continue to build awareness even to the people that are here (job seekers, partnerships between companies).
And they have a blog tied in too, highlighting some of the startup tech activity in Durham.
So, if your company is not listed, make sure it is. And I'd definitely recommend visiting this site often to stay in touch with what is happening in the area.