This is getting close to the heart of the community. Sure, every single one should be mentioned in an ideal world. It is not unreasonable to think that at some time there will be one WWW-oriented citizen that would have the desire to put their organization on the WWW and link it to their community page. Again, they all should be there, not so much to sell goods but to reinforce their roots in the community and reach out to their peers everywhere on a non-competitive basis. Business within a community is marvelous, between communities is even better, and business on a regional or greater basis is better still.
Government is what keeps things running in the community, more or less.
The WWW is a marvelous non-political platform for any community government to keep the citizens aware of what is going on and even ask for some help now and then. It is also a way that community government neighbors can keep tabs on one another and perhaps find synergistic areas. As of now there is no standard template for the ideal community page and maybe this is as it should be. I do know that if any community wishes to create a page there are many marvelous examples to learn from, emulate to some degree, and modify to suit. Chances are if one were to ask someone in another community for advice and help, it would be given.