Groups are fine, and a natural component of society. But groups function best when they are clearly defined around a particular issue, especially if that issue is not addressed elsewhere in society.
A photographer group is probably too broadly defined, try something more specific, like a particular town or a team or a band or a style... You get the gist.
Also, unless part of the goal is to ramp up your coding skills, consider using some of the popular, effective, and well-featured online destinations such as Flickr to host your group. Lots of functionality, plenty of traffic, and the possibility of finding more members for your growing community.
Oh, and I thought frXnz kafka's comment was really funny.