Dropbox is one of those infuriating startups that just won’t show us much of what they’re up to beyond the basic user experience (see video). We first saw them at Y Combinator demo day in August 2007, and talked to them again in March when they went into private beta.

It looks like Sequoia was on them fast though. Last September, we’ve learned, the company raised a small $1.2 million round of financing from the fund, making it Sequoia’s second known investment in a YCombinator company (the other is Loopt).

Expect more news on Dropbox in the next week or two.