As of writing this Fedora 11 has 51 which have already been approved, plus another 9 waiting to be approved any day now. That means in the end there should be ~60 approved features which make it into Fedora 11! This doesn’t even count the work going into external things such as overhauling the documentation or the community work going into the Moksha project.
The features on the list aren’t trivial either, take a look. Almost every aspect of the OS is having some substantial work going into it. You name it, boot time, instant messaging, delta RPMs, 64 bit kernel in 32 bit system, the media player, networking, security, KMS for nearly all open source drivers, compilers, etc.. will be seeing a lot of new love. (Much more than just upgrades) This list will have other distros playing catchup for some time to come.
So, show your appreciation by testing the new release. It may be best to start with the upcoming beta to be released on March 24, so mark your calendars. Even better, in addition to testing sign up and become a part of the Fedora Project. You won’t regret it, the community and innovation you will come across will never be matched anywhere. Guaranteed.