I think there are a couple of stages of being new to chumby. The first being to load up a bajillion channels and then lament there's no clock being shown often enough. Then there's the rearranging phase, possibly including the inserting of a few extra clock widgets. Then there's the experimenting with other channels phase, which is somewhat short-lived until discovering the custom alarms that let you switch channels based on days/times.
But once you get to the phase of experimenting with other channels you start to want more functions on the website. It would really help to have a 'move' option for widget. On the main channel page would be great, but possibly too cluttered. Having a move option on the widget's own page (as part of your channel) would be very handy. That and perhaps a Copy option to allow not just copying to another channel, but within the same channel.
In general though there's really not much missing in either location. It's amazing to see how well the whole chumby experience is coming together!