I've ported GPE Calendar, Contacts, and Todo for the iLiad. Since they share so many libraries, I've included them in a single package. GPE does not have any sync abilities that I'm aware of, so you won't be able to keep it updated with your PC. But, it's a step in the right direction.
It's a standard installer, unzip it to your memory card (not internal memory, as that will have unexpected effects), and run on the iLiad.