I recently have created a Markdown Plugin for WordPress.

It has been tested some my friends, but not many people know it yet.

https://github.com/terrylinooo/githuber-md

I just need some suggestions to improve it, my some questions like:
What features do you need if you are using Markdown to write articles?
Do you think this plugin is useful to you or not, how can I imporve it?

Thanks a million.