So i found this App over @ xda..Its freaking sweet!! I posted it on the Might Thread the other day, but I wanted to share it with every one else.
The App was created by Mohitsapru...
What is does is creates a secure, password protected sms in box, similar to the secure box in the new HTC 1.8. However with this app it will not mess up ur MMS since its just a filter. It allows you to designate certain contacts that will be filtered or you can make certain key words that will get filtered out.
I have been using this since yesterday and its Great! Easy to set up the, GUI looks nice (skinned in sense).
So far i would definately reccomend anyone looking for a secure sms function to check this out!
http://forum.xda-developers.com/showthread.php?t=673387
Enjoy!! Dont forget to show some love to the OP (or me) if you like it