How's CIFS/SambaFS or NFS support these days? I remember people spouting how Mac 'just works' when I could easily cause a kernel panic if the mount started timing out (or if I put the machine to sleep without unmounting it).
It seems better :) I think the finder was rewritten for snow leopard and I haven't noticed the same horrible clunkiness in relation to slow/unreliable network shares. That said, I nearly always use AFP or SFTP for moving stuff around so those protocols could still be dodgy.