From adding a picture, sound, alarm and memo. There's it's brethen application to recognize your hand writing and convert it into texts, but you need to install the application seperately. With plug-in like that, can proof to be very useful for news reporters who need to write fast documents at site.
I mostly use PhatPad for drawing pictures, one thing that WinMob 6 built-in Notes uncapable of. I found it to be very handy, like few days ago at the construction site I described to the worker there how I wanted the jobs to be done. They immediately understand what I meant, all thanks to the drawings. Usually it takes longer when I just talked it out, and have troubles to draw since there are no papers & pen when you need one.
This kinda application should have been bundled with Treo all along from the box.
(blogged with my Treo 750v)