Okay, why Shareaza is not the best client around? 1) I never saw a Shareaza ultrapeer. 2) Shareaza claims to be able to chat to LimeWire and browse LimeWire, but it's definitely impossible for LimeWire to browse Shareaza or to open chat wth Shareaza. 3) It's rather unstable compared to more mature clients (e.g. LimeWire). 4) It claims to be non-commercial, yet it's not open source.