Ok, I'm bumping up this thread because I've become seriously addicted to TextExpander, and I'd like to know whether there's any chance to see support on OF iPad any time soon. (And yes, I've already sent in my vote a long time ago.)
The Textexpander website claims it's "very easy" to integrate Textexpander into another app, and have the following link to their free SDK for such purposes:
http://smilesoftware.com/TextExpander/touch/sdk.html
The reason the app became indispensable for me is because of the ease of creating symbols with it (both on desktop and iPad/iPhone). For technical fields (in my case, medical), it's really useful and unfortunately not standard otherwise. My joy at being able to insert a simple arrow up is quite sad, really.
Please, OG, make this happen quickly!