Agreed with most of what Palpatine said. However, I'll throw in a few other thoughts.
thanks
1. Reviewing PPT files on the iPad was a little awkward for me to use. However, I was running them through iAnnotate and haven't tried Keynote or anything like that. Maybe other people have other thoughts?
Run it through PDF PROvider to turn it into a PDF, and then you can annotate it like any other file. You can also view some in Keynote, but it is not always the same.
2. There are some sites for my school that use flash or just don't display properly on an iPad. If the iPad was my only computer, I'd be in trouble. If you can, I'd go to an Apple store and try browsing those school websites and see how it works on an iPad. I haven't tried any Android tablets so I can't say if they will be any better either....
flash is not a problem. use photon, iswifter, or any of the other apps that enable you to view flash.
1. tablet as only device?
however, i wouldn't recommend the ipad as your only device. i think i could manage, but i'd still have to use the school computers to ocr pdfs, or even load files onto blackboard (this is not possible in any browser i have tried (icabmobile, opera mini, photon, safari, etc.) because the ipad lacks a conventional file system). currently, my mbp does this work for me, but it is only a tiny fraction of my week.
2. a cheap tablet?
regarding the cheap tablet or notebook idea, i strongly recommend against getting a "cheap" tablet, especially if it comes in a smaller form factor. you really need a well-developed app to handle pdfs well, and even on the ipad, it isn't perfect, with occasional slow page rendering. if you are going to be relying on something to read pdfs (a great idea, by the way), then at this point i would say the ipad is the most viable candidate (fast processor, great apps, and a perfect aspect ratio).
3. notebook?
as for the notebook, i have an older eee pc (actually, i think they call it a netbook) and i love it. this thing is a tough little beast that got me through quite a bit of graduate school. however, if you use something that chews up a lot of ram or processor power (adobe acrobat pro), then it can get pretty slow. just be aware of what you are planning to do with it. if you are unsure, get a macbook air, because it is much more powerful (and unfortunately more expensive).