IPod touch as a PDA?

I am looking for a PDA. I need a new iPod, so I was thinking about killing two birds with one stone and buying the iPod touch to use as a PDA.

How well does the iPod touch work with task management?

I am specifically looking for how well the software performs at task entry, and how well it syncs with outlook (I’m running windows) for both calendar items and (more importantly “to-do” tasks.

I know there is a calendar app, but how well does it perform?

While I acknowledge the existence of third-party apps, I would rather the answer be more focussed on the built in apps.

Thanks, all.