it would be very useful to be able to create a folder in Designer so I could collect designer items. For example, I might want to collect certain Forms together into a folder without having to sort through all other forms. This would be particularly useful in Agents where I might be able to collect all the Web Query Save agents. Currently I have to name them by function by prefixing agents with 'wqs', for example.
Another option for this would be to create a 'categorized' field. So that if you add text to it, could be displayed the way a categorized view is seen.