The WRT54GL is a hacker's dream Wi-Fi router, capable of running third-party firmware and upping its signal power
internally. A brave Instructables user shows how to go whole-hog on the blue box with extended antennas, fan-cooled overclocking, and the DD-WRT interface.
Instructable author NostalgicStone offers plenty of warnings before jumping into the details of his hack, and for good reason: it's not the safest way to run a Wi-Fi router. It's also not a pretty sight to have a PC fan running on top of a router, if you have to keep it in plain view. With all that said, this total upgrade is really appealing to those of us who lack Wi-Fi in particular corners of the house, don't have to worry about how pretty the router looks, and don't mind tearing open electronics to do things like install heatsinks.
Hit the link for the full read-through and results testimonial, and share any similar router upgrades you've seen (or pulled off yourself) in the comments.