Off topic, but I know there are many other tech-geeks who prowl. I need your help =)

My company just got a few PDAs with data plan etc, OS is Windows Mobile 6.1

The problem is while the official software to use requires internet access, but don't want the workers to surf on the job.

Been poking around wm6software, handango and but to no avail, thought of floating the question around here first.

Anyone can recommend an app or a workaround?