What Social networking sites have you joined and why?...do you feel overwhelmed

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By all the choices? just take a look at social marker or addthis websites and you see an overwhelming amount of sites to join that's not including the new ones that will crop up based on gps navigation tecnology like fireeagle by yahoo (zkout for example) Or a browswer dedicated to being social like flock. when does it become to much when your friends say hey stop inviting me ! when you never really get to interact with the people anymore because your too busy accepting and denying? Love to hear other's opinions on this