http://news.ycombinator.com/item?id=2329397
Getting Mr Braithwaite to publish at Leanpub.com is also a sign of success.
When we launched we were based on a hacked up version of WordPress MU. We've pivoted a couple times, and Leanpub today is based on writing your book in Markdown on your own computer (or iPad), and syncing with Leanpub using Dropbox.
Along the way we had a brief period where we used GitHub instead of Dropbox, but we felt that limited us to only highly technical authors. (We do use Git internally still, but Dropbox is a lot more accessible and it makes our publish workflow really nice.)
I guess a year ago we were slightly ahead in our timing, or my post was too long, or (probably) I didn't emphasize Eric Ries and Venture Hacks enough...
http://hnpickup.appspot.com/hnpickup_ratio_visual_analysis.p...
More to come. Probably, this week I will get around publishing something on the "karma growth effect".
BTW, I've sent an email to "help@leanpub.com" about latex math support. So far I haven't heard back.
The short answer is that we don't support it. We could if we were just using LaTeX => PDF (which we do), but then things would blow up when doing epub and mobi.
I'll take this as another vote for the feature, though :).