When I have looked for documents on LW, I have noticed that you will simply see all the results mixed together. Like ch1, ch2, ch3, ch4. And when you see things like that, you wonder: chapters of what? My solution is to allow the folders shared on the remote gnutella machine to be visible in the results.

A thumbnail feature should also be incorporated for easy perusal of picture searching.

As for text files and PDF's, a feature that allows you to see the first few sentences of the content when you move your mouse over the result would be nice too.