Is my hardware compatible with Fedora?
Linux is able to support every class of component and peripheral. Fedora includes all of the drivers provided by the projects that are responsible for Linux hardware support. The Fedora installation process automatically detects the supported hardware on your computer.
Some specific models of hardware are not yet supported under Linux, or require proprietary drivers from the manufacturer. If Fedora does not automatically detect a device, you may need to install additional drivers or firmware.
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{i} Network Connections
Modems and wireless network connections require additional configuration after the installation process completes. Refer to the question on network connections for more information.

The following websites provide more detailed information on Linux support for various types of hardware:
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Graphics adapters - http://wiki.x.org/wiki/FAQ
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Audio adapters - http://www.alsa-project.org/
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Printers - http://www.linuxprinting.org/
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Digital cameras - http://www.gphoto.org/
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Scanners and imaging devices - http://www.sane-project.org/
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Modems - http://linmodems.org/
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PCMCIA cards - http://prism54.org/newdrivers.html, http://rt2x00.serialmonkey.com/wiki/index.php/Hardware, http://ralink.rapla.net/, http://zd1211.ath.cx/

The Fedora Release Notes document known issues with specific device models:
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http://docs.fedoraproject.org/release-notes/
For more information on the Fedora hardware policy, refer to the question on hardware certification.