More efficient searches and downloads (3 ideas)

Noticed that the system doesnt have an automatic system to refresh downloads, (i.e. one that finds more sources automatically). How about a system that automatically refreshes your searches say every hour, so that you dont have to babysit longer downloads and the effect of slow down on these longer downloads is reduced.

Also, could there be an option to set up an exclusive link with another individual on the network ( eg for uploads). This would make it easier for two to share a file that may be particularly popular, and would otherwise generate a lot of interest from other users. I understand that you can reduce the ul slots to one, but you still have others queuing, would an exclusive link necessarily help to maximise the rate of a download as presumed? Surely it would at least make it easier for the person known to connect immediately to your file.

In the way that limewire recognises a particlar file that you are already downloading in a search, would it not be possible to conduct searches looking solely for the filr that you are already downloading, sort of like a "super filter"?