There are lots of people for which requiring Facebook is a complete non-starter. From the front page, it looks like FB is required. For some people, deep Faceb

There are lots of people for which requiring Facebook is a complete non-starter. From the front page, it looks like FB is required. For some people, deep Facebook integration makes things easy... but I suspect for your audience (early adopters, HN types), focusing on FB may be a bad plan.