Suggestions:

Max Downloads.. Max Uploads like in KaZaA.... except the Max Downloads controls the Max Uploads.

Stop Button in the Search.

Ability to erase history in the auto-complete.

Ability to refine searches even more like in Gnucleus.

Supernodes? Ultrapeers? not sure if it has it or not...

Hashing?...

Ability to pause downloads.

If you think of anymore... Please post them here.