Yes a web base application can be done (I have done a version for test purposes)

1) Basically, setup web site and have page that show users vehicle.
2) On server or slave PC setup mapoint with comms link
3) User requests location via web
4) Server then requests location (simply creates a request file either on server or salve PC)
5) Server or slave PC links with Tracking unit and gets relevant data
6) Server or Slave PC creates a web page track position (very eany in VB)
7) Places this created web page on server
User looks at page and sees position.

All this needs VB and a certain amount of coding, also a tracknig unit that you can configure to do what you require.

Thanks