I've previously suggested being able to add a folder/gdb connection right from the modal dialog boxes ("Add folder connection from 'Add Data' and similar dialog boxes") as you can in ArcMap. This would be really handy for adding a source to your project for future reference when you're adding or exporting data, rather than having to go chase it down in a catalog view/pane again. The next logical area where I thought I might be able to find that option was the List by Data Source view of the TOC, but I'm not finding it:
A R click menu option enabling adding the selected source as a connection would be appreciated; otherwise, users still have to go chase it down in a catalog view a second time rather than just adding it when they browse to it in the modal box.