And the right thing is that Gnutella is not run all the time at background, while Morpheus/KaZaa do ususally, so it really gives a clue why Gnutella *seems* to be unpopular.

What can I say? I can still actively and successfully use this great tool to find some even very rare things on the Net... So, it's worth it's little cost. While e.g. KaZaa's cost is too high for even it's highest availability and popularity...