Hacks

Get your Mac mini (or any other Macs for that matter) to run Front Row.

Learn how to encode video for the 5G iPod without Quicktime Pro.

Update: November 1, 2005
An open source application, Handbrake, let's you convert DVD content to MPEG4 so it can play on your 5G iPod.

November 4, 2005
Another application, MoviesForMyPod, claims to make putting movies into your iPod easier.

November 21, 2005
Another tutorial for Handbrake entitled "Rip DVD's for your iPod Video [sic]" is now available. I've tried Handbrake before and it's pretty straightforward. All you have to remember are the settings that's best for the 5G iPod.