I've been looking for a pdf reader that provides annotation support.
It's a must for us research students that need to go through large
amounts of academic text. I ran into this bug[1] that says that Evince
would have annotation support in F15
It is rather well hidden, but there is indeed annotation support in Evince. Here's[0] the help of the F15 version. (Note that if there wasn't any support, opening a Fedora bug would be unlikely to fix that - issues like this belong upstream)