I'm also a big fan of using standard notepad programs (this, TextEdit on OS X) but struggle to find a good program for mobile note taking. Any suggestions for iOS or Android?
On Mac OS X, I use nvALT[2] setup to use the same directory.
The directory itself is inside EncFS filesystem, which is mounted over cyphertext directory inside Dropbox so there is continuous encrypted sync as well.
[1] http://www.notebooksapp.com/ [2] http://brettterpstra.com/projects/nvalt/
You might also like Drafts for iOS - it's really more for write --> push to x service, but it does that really well.