I'm working to use Filemaker to develop cool net applications. So far, I've made four web-databases: an Inventory system, a Service Call Tracking System, a staff assignment system for the sysadmin, and a job-tracker for the Operations department.
Here are some Filemaker related links:
The next cool thing will be to dump the service calls directly to the technicians Pilot PDA. That will be done with the help of AvantGo Developer Programs - Applications that download webpages when you dock your Pilot!