The app mSecure is terrific. I use it on two PCs, and my Android phone. I added it to my Nook Color yesterday and ran into a problem with the sync function as between mSecure and Dropbox. I emailed mSecure and got a response quickly indicating that the 1.4.1 NC release broke the mSecure app. A programmer with mSecure reports that an update is scheduled to be released today that will fix the app for use on 1.4.1. I'll post results when I get the chance to update mSecure on the NC to the updated app.
FYI... 64-bit block ciphers, such as blowfish, are being phased out for security apps. If your storing the latest Taliban cheat codes, you may want a more robust encryption solution.