First, if you have questions like this, it’s super-easy to get answers in more immediate and helpful forums. There’s the venerable but still well-populated fedora-list, the general user forum on IRC Freenode at #fedora, and the large community at Fedora Forum, all of which can help with general user questions.
Having said that, in Fedora 11 this is remarkably easy. You just install the pulseaudio-module-bluetooth package, and use the existing Bluetooth applet to pair your audio device with your Fedora system. PulseAudio will be able to see and use your Bluetooth audio device. I’ve done this with my cheap-o little Motorola H500 earpiece and it worked like a charm. I didn’t try this in Fedora 10, but I believe that module exists there too.