There a number of possible ways to make the URL useful:
1. The tooltip can remain until the pointer moves outside of the window focus.
2. Right clicking on the user could bring up an option "Open URL..."
3. A user's status could appear under the username.
There a number of possible ways to make the URL useful:
1. The tooltip can remain until the pointer moves outside of the window focus.
2. Right clicking on the user could bring up an option "Open URL..."
3. A user's status could appear under the username.
I guess it depends on whatever would be easiest.