Textastic for Mac is now available on the Mac App Store: https://itunes.apple.com/us/app/textastic/id572491815?mt=12

We seem to have similar workflows. SourceTree is my tool of choice, too. I think SCM integration is currently out of Textastic's intended scope.

I'm using Marked, too. You can simply drag the file icon from the window title in Textastic onto the Marked icon. It works excellent.

That one is on my todo list. I'm missing it, too :)

I'll have a look at how this can be done for a sandboxed Mac App Store app.

Which command would you prefer? "textastic" or something else? (TextMate uses "mate" for example)

Thanks for your feedback. It's easier for everyone if every topic in the feedback forum is about one thing.

There are already existing topics for your points that you can vote for or comment on:

Edit live files: http://feedback.textasticapp.com/topic/27218-edit-live-files/

JavaScript debug console: http://feedback.textasticapp.com/topic/32860-javascript-debug-console/

I think "AutoBackup" is a new idea though.