Address Book/Calendar Solutions for the Console?

Florian Cramer asks: "There are many good addressbooks/calendars for GNU/Linux (plan, ical, jpilot, kalendar, gnome-calendar, gnome-card, to name only a few), but they all require X11. Does anyone know a decent console-based addressbook/calendaring solution, perhaps even one which can sync its data with Palm Pilots? That would be great for all the vi/mutt/lynx/bash people out there, and welcome for (a) underpowered hardware and (b) future Linux-based keyboard PDAs."