I could not agree more with the sentiment about making your blog your own hub, though am not sure why Luis limits a scope to "my own personal *business* blogs", though I just assume it his his scope of work.

But I cant really hop a bandwagon to be a "curmudgeon" -- "a crusty irascible cantankerous old person full of stubborn ideas" or "a cantankerous person; an ill-tempered and disagreeable person."

It's not about being stubborn or cranky, but being pro-actively pragmatic and looking out for your own future.

I don;t need to go as far as "I wont use your service"-- I am just selective about what I let them have. For example, I cannot think of anything I have put into LinkedIn that I can see really is all that precious. Maybe I just dont LinkedIn enough.... no, I do.

For Facebook, I only let them have one image, because they are StingyBook with media -- thet will suck in media from other external sites with open APIs, but they wont let content flow the other way
http://cogdogblog.com/2009/02/16/stingy-facebook-gets-none-of-my-media/

Have fun hanging out with the other curmudgeons, maybe y'all can start a NIng ;-)