I'm using OI Notepad for taking my notes, I think it's a great and simple app.
The OI Notepad says "Notes are stored in internal memory by default". I'd like to be able to store my notes on the SD card by default, because I'd like to be able to store all the notes on my phone in a single folder, and synchronise this on my computer with a piece of software such as Unison (open source). This way if I edit a note on my computer and synchronize it back, I'll have the changes directly on the android phone.
I can load a file from SD in the current version of OI Notepad, but when I open it again in the "last file menu", it will be the version in the internal memory.