You could include discount (http://www.pell.portland.or.us/~orc/Code/discount/) and use it to render a Markdown preview. It lacks Markdown Extra features like footnotes, but covers all of standard Markdown syntax and can easily be merged with Objective-C.

Currently the user can select HTML or XML or Javascript from the Syntax Definition popover. But SVG usually involves tags and Javascript, so it would be nice to have a mixture of these highlighting rules. In particular, inside of <script> tags it should highlight for Javascript and outside it should highlight for tags. (Maybe this suggestion would also make sense for regular HTML with Javascript.) At the very least, Textastic should have an SVG entry in that popover and apply some kind of highlighting by default (probably XML). Thanks!

Support connecting to a remote server using an external link, like sftp://username:password@hostname.com/initial/remote/path/.  It would be nice if these connections would open your app and setup the connection for me.  For example we might have links like this in our internal web sites.

(feature request received by email)

Could we also have bookmarks for the connections?  For example, I have a connection where I might be at /httpd/example.com/public_html/ at the initial login.  However I wish to also bookmark a folder location at /var/other/long/remote/path/ that I switch between often.  These bookmarks could be nested under the one connection, rather than creating a connection for each different folder path.

(this feature request was received by email)

This is a nice alternative to Markdown, particularly among Python users. Anyone who used Sphinx for documentation is writing in reStrutucturedText.

Is there any option to open the local files in built in Safari browser, or Opera app, to see the result?