I finally executed a jailbreak on my iPod Touch using the excellent iJailBreak software. It was literally a question of downloading the software, connecting my Touch, double-clicking the .app and then clicking “Jailbreak”. 5 minutes later, I had a fully-functional Touch, complete with Installer.app, ready to go.
I haven’t had a chance to install much in the way of add-on software, but at least I got Mail, Google Maps and jiggly icons out of the deal. *grin*