I just installed all 3 of the apps they have available, Dates Tasks and Contacts. There is also a sync app, but it is not available yet.

http://www.pimlico-project.org/index.html

They look good. Contacts ties into the built in contacts information, allowing you to add more fields. Calendar has a web based function that I have not found any documentation for, but it looks interesting.

It's a project of Opened Hand, who looks to be a developer for Nokia

update: Dates will read a ical feed, which Google calendars support. It is a read-only feed, but it works.