I did write a mod to put it back (under beta mods)
Warning....this adds 1 or 2 queries (depending on the option you choose) per post. (that's post).
So if your site is too busy (your site is huge) it might not be able to handle it. Use with caution. But wanted to let you know it's there if you want to give it a try.
The loss of that feature was a result of the conversion to Usernumber.
