500 Days of ... Jenny Beckman?

It's not really a spoiler to say that in the upcoming cute and quirky 500 Days of Summer, the film begins with the following disclaimer: " Any resemblance to people living or dead is purely accidental ... Especially Jenny Beckman ... Bitch." Having seen this film play at festivals with Q&As afterward, the first or second question asked is always about whether or not Jenny Beckman is a real girl and perhaps the inspiration for the character Summer (played by Zooey Deschanel). The filmmakers have said that she is real, and at a recent screening of the film in Chicago, director Marc Webb added this to the end of his answer: "... yeah, she's real, look her up on Facebook."

So we looked her up on Facebook, and, yup, there's the Facebook page for a girl named Jenny Beckman who kinda sorta resembles Zooey Deschanel. She's a fan of 500 Days of Summer, her favorite music lists bands on the film's soundtrack (The Smiths are listed first) and she's friends with director Webb, as well as the writers of the movie. All that being said, I've walked away with a few questions:

1. Is this really the Facebook page for a girl named Jenny Beckman, and is this same Jenny Beckman the inspiration for Zooey Deschanel's character in 500 Days of Summer?
2. Is this just a piece of viral marketing on behalf of Fox Searchlight and/or the filmmakers to get people interested and keep them interested in the film?
3. If this is a hoax, then who is that girl in the picture? Is that really a girl named Jenny Beckman? Is the name Jenny Beckman fictitious, but is that still a picture of the girl who inspired the character?

We want answers! What do you think?