Looking into the future I think the most needed features are (in order they should be implemented):

-GGEP
-Complete implementation of HUGE
-gnet:// urls (clicking link launches search by hash)
-Global searching (see Vinnies proposal at the_gdf)
-Partail File Sharing
-Publishing to Gnet (mirroring, proxy, ect) <-----------<<<<<
-Advanced searching (and, or, +, -, ect)
-More meta data!!!


Maybe you can see where this could go ;-)