Done. For HTML & XML that is. Check out the Experimental bundle. http://macromates.com/svn/Bundles/trunk/Bundles/Experimental.tmbundle/
That's great to know about. It does a minimum of the "balance" functionality, IMHO. However, it appears to be some what finicky regarding which side of the brace one's cursor is on. So it's clunky at best. Though I am happy to learn about the single level of balance feature that it offers. It will be useful for occasional use. A former user of the "the app formerly known as the mac programmers first choice" would expect a much more refined implementation.
For a more refined version, imagine expanding the first selection wider... to the next larger scope of balanced braces by repeating the keystroke, and again.
And then picture using your mouse to click once on any brace and the respective block of code is selected to balance the brace that was selected with the mouse. (up or down the document) [[ actually it's a single mouse-down while a modifier key is pressed.]]
I think those features are useful when surfing through new code written by someone else. :)
I am presuming Allan would be needed for some of those aspects. Though if the internal architecture of Textmate does not support this feature, then that is understandable.
Cheers!