We had a similar issue in our company just recently. What we do is use the color coding of tickets to highlight when the mail monitor is the last 'technician' to modify the ticket. This will make the ticket stand out so you can see it needs attention right away.
Just right click anywhere in your grid and choose Customize (CTRL-Shift-C). Choose the format tab, then click add. This is how ours is setup:
You can also publish this to be a selectable public view. Select the drop down next to Current view at the top of your grid and choose manage views. Select the view you just created and choose Publish. Hope that helps.
Edit: You could also further this by sorting your work orders byt status so that all work orders with "waiting for info" as the status are grouped together.
Interesting strategy; the only downside I see to it is that I’ve found that the formatting rules often disappear if the view gets modified. For example, if you filter just to look at requests from Bill Smith, an asterisk appears to indicate the view is modified, and the formatting doesn’t follow. You can abandon changes to view, of course, but again you run the risk of having things in normal formatting that you want to stand out.
I took a similar approach which is to change the formatting of my inbound mail so that if an email said something along the lines of “re: input needed” it shows up big & red in my inbox…