Using custom commands like site wipe, site nuke, etc requires navigating one or more likely several menus. It would be really cool if it was possible to place a custom icon (associated with a name) in the icon/button bar with connect, refresh, quit, etc. That icon would be tied to a regular command style script (so you can operate on name, owner, etc). This would make a 1 click operation for really common tasks! It looks like there is already a popup menu to let you choose which buttons to show so new entries could show up there as well. I know the order is fixed for existing items, so a sort order or something for custom ones might be needed.
Just an idea
I'd also like to mention the custom column option again. The ability to display are re-order named MLST/D fields would be insanely cool. In fact, I miss the ability to overload the already standard "links" field in regular listings. Could that be parsed and added as a normally not-shown field without too much effort? I'd like to number things 1-99 (think latest dirs, top downloads, etc) but right now I have to prefix the number to the name which works, but is a total pain since the name isn't really the name anymore so operations have to silently strip off the prefix and it turns into a pain to get right... Or I overload the group field with the number and sort by that and it works better, but it would make more sense to use the links field.
Of course adding a new field name and publishing it in MLSD listings would be the best option but only makes sense if clients can show the new fields. I know drftpd already supplies a slaves field to show where files are located but you can only see it in raw listings and MLST checks.