1. I don't see why it would be anymore difficult to keep up with a lecture or presentation via typing, whether it be on an iPad or laptop as I would be using the "real"/hardware keyboard.
3. I do my current homework and stuff in Pages and presentations in Keynote. All I do is convert to .word or .ppt when sending to myself in school or on a flash drive.
4. Most sites that I've visited for research are text-heavy/intensive, not Flash. However, that I've visited had flash so I get the jist.
I'm aware that I won't be completing ALL my work on the iPad. However, it looks like a great tool to start work on and then FINISH it on a desktop/laptop. This is what I plan on doing (for most of the time).