Originally Posted by zerospinboson
You're kidding, right? Although I'd guess you aren't. Anyway, that would really make the PDF support (assuming it's meant mostly for textbooks that are hard to layout in .mobi) pretty much useless.
I completely agree! And no I'm not kidding...
See the guide
It clearly states:
The options available while reading a PDF file are slightly different than when reading a book or a periodical on Kindle. Options that are not available in PDF files are grayed out in the menu.
Below which there is a picture of the menu and the "Add a note or highlight" option is grayed out.
I've got one pre-ordered, but will cancel spot-on if I find out annotations in PDF are not supported.