"SpeakerRate is all about constructive feedback from real people. That means putting a face to a name, and on SpeakerRate, that face is your LinkedIn Profile. You can use the site without validating your account, but your ratings won't count as much (and you'll be far less cool)."
hmmmm ..... i don't have a linkedin profile, and i am not going to create one now just to 'validate' my account. it seems very restrictive to me that you only support linkedin, nothing else. (FYI: in europe, xing.com is much more popular for 'business' networking than linkedin.)
at the very least you should support facebook as well, i think.
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