Quite a few new demos out.. pspdemocenter.com is where I grabbed them.
Problem is they're all in Japanese haha
2 years of japanese and it's barely paying off :/
But anyway the new demos are: Airport Hero: NaHA, Airport Hero: Narita, Eiyuu Densetsu, Gurumin, and Intelligent Liscence 2
All "require" firmware 3.40, but I hex edited mine to work on my 3.11
You can probably find a custom demo somewhere, or just unpack it and edit the SFO yourself.