[moge]

really interesting. One comment on the UX. Since there are no clickable buttons/links I thought this was just a coming soon page.

Create a button that says 'track now' or some other call to action.

Once I read the middle paragraph I understood how it works but I bet most people will never piece that together.

and yes, package tracking would also be good. Have a look at Dominos pizza order tracker. Something as easy as that would be fun and engaging.

[stcredzero]

Create a button that says 'track now' or some other call to action.

How about 5 or so entry fields for tracking numbers and a button to "Create Dashboard" to track all of the at once? You'd get back a page with a long universally unique random URL that you can bookmark.

Once on the Dashboard, give the user the option to password-protect the page by registering.