Eventbrite, the online event registration service, has raised $6.5 million in new funding, according to an SEC filing; the company tells us that Sequoia Capital is the only firm providing the money. Eventbrite’s service—which includes a customizable events page and e-mail invites—is free for free events, although the startup takes a cut of ticket sales when users charge. The company raised a first round of funding in June 2008 from The European Founders Fund; other backers include Bebo co-founder Michael Birch and YouTube co-founder Jawed Karim.