DoodleBlast or PopCorn Rush. But what I love about my PlayBook is that I can show-up to meetings (which I have way too many of) and my hands are completely free. I got my BlackBerry on my side and my PlayBook in my pant pocket or my Jacket Pocket.
When I pull out my PlayBook, I get a few glances but when I start to zip around on it in a meeting, that's when I notice people around me starting to look over my shoulder.
Mindmaps by Vandewalle Bram. If you are familiar with mind mapping you will find this to be a great intuitive tool. It's custom built for the PlayBook and it's beauty is it's simplicity. I've tried all the other mindmapping apps out there for PlayBook but by far, I always come back to Mindmaps. If you are not familiar with mindmapping, I think you will find with a little practice that you will be able to understand complex ideas, process large amounts of information, and even solve challenging problems with the use of mind maps which provide a synaptic understanding of concepts.
If you are new to mindmapping, there are several sources to learn about it. Mind Mapping is a great compliment to the tablet, because, let's face it... VIRTUAL KEYBOARDS SUCK compared to real keyboards but mind-mapping doesn't require you to do a ton of typing, you just need to jot down the key trigger word.
So what are your favourite PlayBook Apps?