By default the iPod Touch is just a media player with Safari, some Youtube-version of Safari, a read-only calendar, a contact list and a world clock.
To get the other stuff, including a read-write calendar, you're to jailbreak it and install Installer.app (just point it to a specific site in the built-in browser).
Currently installed using it is: VT100 terminal, BSD userland, OpenSSH, SummerBoard (some customizer), a RSS reader, a dictionary, iPhone Mail, iPhone Notes, MobileMoney, a SysInfo tool, MobileTodo, a finder clone, irssi, ncftp and ScummVM (with Monkey Island and Indy4).
How's that not cool?