I like the concept, in that it tries to justify another shiny object I have a hard time caring about; "lifestreaming." If the spokes serve diversified audience niches thru customized content, then I get it. Awesome.
If the spokes are different communications tools- for example, Twitter and Facebook serving a blog as hub- then you can’t get me to care.
Also- if hub & spoke means what I hope it does, then it really represents nothing new. Can you dress common sense in new clothes and call it a trend?
I guess you can.