Your comments

This proves to be more of an annoyance than a deal breaker, but its close. If I were developing in Python primarily, it would be a rather no brainer.

The ability to delimit the method used for "tabbing" is of great impact to languages that are whitespace aware.

As an aside: The annoyance reason is that Textmate (and other apps) provide simple bundles for converting tabs to spaces, and since the character code (^I) is easily scripted and replaced with 4 spaces.

However, if Textastic wants (and it appears that it does) to become the "TextMate" of the iPad, I would consider this an essential feature, especially as even more droves of developers head to the whitespace aware languages that have been mentioned here.

In any case, *voted* for this one.

Love the font choices though, happy to see DejaVu :)