Well, I did a search and couldn't find anything. For anyone looking for secure communication between Android devices here's a company for you:
They offer 2 apps, both available in the Market. RedPhone and TextSecure. RedPhone provides secure end-to-end encrypted phone calls between you and any other Android phone running RedPhone. TextSecure does the same for SMS messages. I've installed both apps and they seem pretty nice so far.
Glad to see more security oriented apps around lately.