So over the years, we have some old desktops in the office which aren’t really good enough to use for development any more. I’ve started breathing new life into them by using them to backup our Subversion repositories by using svnsync.
By setting up cron jobs to sync every x minutes or even hours you can have a huge amount of redundancy for next to no cost.
The read only mirrors are also handy for other applications that create load on your repositories (build servers etc) so I use a near real-time mirror to run trac and our Bamboo server from.

Just finished version 0.1 of my BambooTracPlugin
It adds items from your Bamboo rss feed into your trac timeline.

It’s basically just a hacked up version of the HudsonTracPlugin but I’m still proud of it

Feedback is welcomed, not sure how active I’ll be with development though so if anyone wants to take ownership (or co-ownership) of it just let me know.