I got PocketDOS registered and have installed several DOS games like Monkey Island, SimCity and Maniac Mansion. Also installed HP Connectivity Pack and Windows 3.0.
I got Quake and Doom up and running. Doom was the hardest, I needed to use the -fixvid switch or else it would crash on my Jornada 720.
I still prefer the keyboard on my NEC 900 but the Jornada is way more portable.