Publish a page as web service and UI

Hello everyone,
We are going to implement a development to improve de picking of a warehouse with a PDA. My first idea, is to implment it with WebServices, publishing pages that are going to be accesible from the terminal.
How can I do for implement a page with an accesible UI for the user?
I’ve read that I should probably implement new simple pages in NAV, adapting them to a small screen.
Any hint about this issue? Am i focusing on the right direction?

Thank you very much!