A few months back we created a mobile work order management system for an "underground cable laying" business. I did not even realize this was an "industry" category, but soon learned it even has its own annual conference in Las Vegas.
Our customer works on behalf of utilities and phone companies to lay cable primarily along roadways. Our solution was delivered using Pocket PC handhelds, MobileDataforce's Intercue Mobility Suite software, and uploading to an MS-Access database application.
Recently this same customer has been pondering an upgrade to our PointSync solution which would allow for bi-directional database synchronization and a full RDBMS on his handhelds.