The existing search and replace is good, but something akin to BBEdit's grep search and replace would be a godsend. You can, for example, search for a pattern, specifying sub-patterns of that pattern, and replace only portions of that match with something else, including portions of the matched text. Etc. It's incredibly powerful and useful. Also, obviously, grep for just the search part would be great too.

Add support for Amazon Simple Storage Service.

It would be really helpful to have a JavaScript debug console when editing HTML files... at the moment, it is impossible to find a problem when using the preview functionality of Textastic.

Support for SugarSync would be great. SugarSync is basically DropBox on steroids, and works in certain environments DropBox won't (like in your "home" directory in OSX). Unfortunately, it's not as popular / supported as DropBox. Maybe Textastic could help change that?

would be really great if it would be possible to create custom syntax database for use in special scripts. Example:
I create a new database and under this database I copy/paste or type my functions, expressions, modifiers etc. then I assign them colors and then save the database. Then I load up a script or begin typing and Textastic begins syntax highlighting according to my newly created database.

Currently it's not possible to use pictures from the Photos app in Textastic. This would be nice to have when you want to use a picture in a html file.

Allow the user to copy media from the photos app to Textastic.

A feature I use extensively in Sublime is multi-cursor or 'Multiple Selections' as Sublime calls it. It would be quite a time-saver.

A nice demonstration can be found at https://www.sublimetext.com

When you use TextExpander to insert a code snippet with several lines, only the first line is indented correctly. Find a way to indent all lines.

This could also be useful for text that is copied and pasted.

Textastic keyboard is awesome. It's fast, accurate and complete at the same time; a must-have for everyone trying to write code con an ipad.

I (and I hope other users too) would really appreciate a "standalone" ios8 textastic keyboard. It will be useful in soo many other apps:  ssh, latex writing, interpreters like pythonista, or just to write some code on a forum or email.

I will gladly pay 2-3 € for something like that :)

Split screen and slide over would be incredibly useful for iPad powerusers… By the way, Textastic is an amazing program. Love it.