This website was created by a person who wanted to see how big of an application he could build in a single weekend. So he asked HDSLR users in his environment what kind of website they needed to boost their business. Most questions had something to do with finding new clients. That is the idea behind Findashooter. It took him the equivalent of two weekends to complete the app instead of one but who cares?
You'll find communities and competitions here. Both are motiviting and inspiring. In some way participants form communities too ;)