I don't mean to blow anyone's mind here, but Felicia Day is very pretty. She has a nice face and beautiful hair and probably doesn't get judged for being a geek based on appearance alone. That said, her devotion to geekdom is genuine — she's written and starred in five seasons of The Guild, a webseries revolving around an online gaming community, spends a large part of her time at conventions as both a fan and a panelist and is a favorite of Buffy creator/nerd overlord Joss Whedon. Basically, her Jed Whedon (brother of Joss)-directed video for "I'm the One That's Cool" comes from a real place, so let's just sit back and enjoy.
It's a fun song, and I definitely enjoy Felicia Day... but there's a current mindset in the geek community about "posers;" people who are only geeks because they're cool, and who shouldn't be allowed into the fold until they've "proven" themselves.
I run into this attitude a lot at Cons... guys who Alpha Nerd me because they assume I, as a woman, am only acting like a geek to get guys. One guy actually yelled at me, in the middle of a room party, for confusing the lineage of Robin's (I put Dick Grayson in the wrong spot.)
This can be especially tough on people who just happened to not grow up Geek. Most nerdy hobbies-Magic, comics, video games-can be rather expensive to maintain. If your parents refused to buy you that new system, or encouraged you to spend money on novels instead of comics (more economic bang for your buck), or if you simply lived in a small town without a big nerd population and didn't discover these activities for a while, your Nerd Card is in jeopardy regardless of how nerdy you call yourself now.
Again, I really like Felicia Day, and she's just speaking a thought that a lot of current geeks have... but is no one else bothered by the elitism behind it? By the idea that you have to endure a "trial by social fire" before you're allowed to be a nerd?