InstantMirror-0.3 is available in RPM built for F8. It seems to be working, although it is very early so please test and report bugs in the project's Trac. See the project's Roadmap for planned improvements (mostly having to do with making it far more efficient and faster).
Earlier on Friday I got mod_python and InstantMirror.py working on the Buffalo Linkstation. This is a pretty neat appliance: 500GB hard drive with an Ethernet jack. With 128MB RAM, ARM Linux runs with plenty of RAM to spare. The device is very easily hackable to add additional Linux software. Somebody even made ipkg's to easily install stuff onto the device. This is how I got mod_python. So now I have a home mirror running on a very low power Linux-based appliance. InstantMirror grabs and stores stuff on-demand, and I use rsync to fully populate some parts of the tree that I know I will be using. Then I set MirrorManager to automatically point my yum clients to my local mirror when I am at home.
Got a Linux box on your home or small business LAN? Make yourself an InstantMirror. =)
Development: HELP NEEDED
This page describes the next major step in development for InstantMirror. We could use input from other developers, especially if you know python and multi-threaded programming. Is this proposed design sane? Is using a local socket a good idea? Is there any better way to achieve this goal?