Recently I decided to modchip my Gamecube. Getting the modchip was easy XenoGC is still available but the biggest problem was the case to fit normal sized DVD's. Gamecube replacement cases just aren't made anymore but I found this ebay shop still selling them and in large quantities very cheaply (apart from P&P to England but what the hay it's a Gamecube case with flashing LEDs what's not to love?).

Installation of the modchip is easy if a little fiddly but the soldering is straight forward. Adjusting the laser is the most difficult part for which you'll need a multimeter to reduce the OHMS from around 500 to 200.

Of course you could buy a WiiKey fusion which is an SD card device that replaces the original drive however I've yet to see any neat and tidy ways of doing it and all ways mean you cannot play original disks.