[ANN] Draftastic -- Markdown-based collaborative editor

[Nick Blanchard-Wright]

Hi everyone,

We've just launched a collaborative editing site that relies heavily on 
Markdown. We wanted to say thanks, and we'd love any feedback from the 
Markdown community.

http://draftastic.com/ is a realtime, multi-user text editor. It does 
locking on arbitrary blocks of text, rather than locking at the page level 
or trying to merge character-by-character changes, neither of which ever 
seemed comfortable. Basically, it's version control for natural language.

The blocks are all handled by WMD (which could not have come at a better 
time!) client-side, and PHP Markdown server-side, with some XSS filtering 
thrown in.

All the interesting Markdown-related features are in the free version 
(we're charging for hosting, not tools). It should be plenty for personal 
use and small projects, but if your organization has contributed to 
Markdown and it wants a larger instance, it's entitled to a 20% discount 
by way of: https://draftastic.com/signup?code=tharkdown

Thanks!
Nick Blanchard-Wright and Charlie Loyd