the library should have three columns to the right side: uploads, hits, and locations. uploads is in the form "#1 / #2", #1 being completed uploads and #2 being attempted uploads. hits is just a single number, which increases as incoming queries match your files. (for instance, a search for *.mp3 will raise all your mp3s hits by 1.) locations is also a single number, and they'll raise when another client exchanges information about a specific file, telling you of other places that contain the exact same file you have.

they should be sortable -- but asof 2.6.3 they aren't. (due to some problems introduced by changing from java.lang.Comparable to sun.java.util.collections.Comparable in one place and not another.) darn those mac os9 users