I love notebooks, and lately I’ve been experimenting with new types of notebooks, made possible by the portability (and multimedia capabilities) of the iPad and other tablet computers, as well as smartphones. As I wrote in a recent column, these apps make the most of the iPad’s capabilities — the handheld screen, the microphone, the ability to use a stylus and grab images from your photo library — to turn the notebook into something more “Matrix” and less Moleskine. They’ve got a lot going for them, but I haven’t really settled on one that I use on a daily basis. The issue? For me it’s finding something that’s truly simple — that doesn’t really make me think about how to use its various features — and yet provides a lot more than just a legal pad or a simple text-based note-taking app.