The preview-version of phex for MacOSX works good for me.

It finds files and gets connected, and it downloads well enough.

Only drawback is, that it still has bugs (what else did you expect? :-) ) and, that it needs hours to get the list of my shared files (my computer is slow so that might not be the programs fault).

I can use Gnutella again!

Thank you, Gregor!
Thanks to the whole MacPhex-Team to enable me to use this software!
Will it support magnet-links, when 0.8 is done?