This request came in from a customer account and seemed interesting and of use for other customers.

Here's a practical example:

For instance, we can link directly to a dashboard's default tab:
https://tealeaf.companysite.com/Portal/Dashboard.aspx?selection=1016

But currently there is not a way to link directly to a specific tab that is not the default tab. For example:
https://tealeaf.companysite.com/Portal/Dashboard.aspx?selection=1016&tab=2

The use case for this is a rotating dashboard used for monitoring: using a browser plugin we would want to show each tab for 30 seconds, and then show the next tab. If each tab has a unique URL then we could easily do this.

I know we could consider a work-around, by creating each tab as its own dashboard. But this would be some duplicate work.