My aim is to create a 'loose' categorization of the services growing up around 'social networking' guidelines, and not necessarily all 'social software' offerings. In a series of correspondences, regarding this categorization effort, my friend Valdis Krebs offers:

After reading your list I was overwhelmed. Market confusion is not good for anyone! I think someone commented in one of your previous posts saying that "two is too many". I would augment that, and take a Zen perspective,: "Two is too many, and one is not enough!"

And Clay Shirky offers:

the energy that will go into keeping elements and taxonomy in line will go parabolic. The field is expanding so quickly that the list will soon become dominated by edge cases, so I'd err on the side of inclusiveness and free text description rather than hard categories.

I will endeavor 'to keep it simple' — fully aware that any effort to organize this surge of social networking vehicles will never be sufficient. In the spirit of due dilligence, I will continue to create a 'loose' semblance of categories, augmented by 'free text description' — to avoid amassing a huge 'lump' of services in this current chaos of creation. (-:=