PBwiki has several plug-ins available, on this page are the Productivity plug-ins.

 

Any Google Gadget, such as this weather module.

See other choices here.

Or an asynchronous message board.

Or any RSS feed that you want to capture

A calendar from 30 Boxes, perhaps?

This 30Boxes calendar plugin will be phased out on June 30, click here to learn more.

A stock chart with daily, 3 mon., 6 mon., or 1 yr. time horizons?