TITLE: Best tablet computer for mathematics
QUESTION [42 upvotes]: I'm not sure if this is completely appropriate, but I thought I'd ask here.
I'm in the market for a tablet computer.  Unfortunately, my (mathematical) needs are very different from the needs of the sorts of people who usually review these things.  Namely, I want the tablet that is best for preparing lecture notes and taking notes in seminars.  It seems like most of the reviewers on "computer" websites are either looking for toys (like the iPad) or tools for creating art.  I just want the most efficient way to create a multi-page handwritten pdf.  Does anyone have any recommendations?

REPLY [5 votes]: To address part of your question, the iPad is far more than a toy for mathematicians, especially for reading mathematical articles.  Goodreader is the best means of reading and annotating PDFs I’ve ever seen; in particular, the usual size of LaTeX articles fits very well on the screen, with a little zooming, even in portrait mode.  I’ve virtually eliminated my use of my printer, both for reading others’ articles and correcting my own XeLaTeX output.  
Be very sure to test a PDF reader on real articles before it’s too late; even Adobe renders the Computer Modern font unacceptably on-screen, though with decidedly different results in different situations and platforms, and Okular on Linux is virtually unreadable at 100% zoom.
For note-taking, I’m not a big fan of raw handwritten text (disclaimer: I worked at Apple during the Newton days, and at Palm); I expected to have to buy a hardware keyboard for my iPad, but haven’t needed to yet.