There seem to be no plugins in Fedora 11's repository, and Gnome-Do is mostly useless without plugins. I took the liberty of making some, using Fedora 10's .8.0 gnome-do plugins as a base: http://www.xmission.com/~ink/gnome-do/
Plugins have been split out of the core gnome-do upstream. As such plugins is now it's own package, and has to go through the review process, which in turn has stalled due to a bug upstream. Closing this as NOTABUG, refer to https://bugzilla.redhat.com/show_bug.cgi?id=489014 for progress on the plugins package.