Yaowsahs! We have high hopes for Producteev, a task management tool that is showing a lot of promise. Unfortunately, it isn't (yet) in the Google Apps Marketplace but we're hopeful that they'll decide to get onboard. Nonetheless, they have pretty good integration with Gmail and Google Calendar, so you'll definitely want to take it for a spin.
It wasn't exactly clear how to go about connecting the dots...so we tossed together a quick how-to video and guide to help you get started.
3 Things We Loved
1. YEAH! Multiple paths to creating tasks
2. Super useful Google Gadget integration
3. Slick little iPhone app
2 Things We Want
1. Tighter integration with Google Apps (Docs and Contextual Gadget)
2. 2-way calendar sync (editing calendar entries doesn't update the task on the Producteev side)