some adresses to connect to:
connect1.gnutellanet.com
connect2.gnutellanet.com
router.limewire.com

BUT a very much better idea is:
use any other client - don´t use morpheus!


it seems to be hurting the network, and you´ll have lots of popups.

some better clients I know:
shareaza - www.shareaza.com
bearshare - www.bearshare.com
freewire - www.freewirep2p.com
limewire - www.limewire.com
gnucleus - www.gnucleus.net

Try one or all of them and use the one you most like. They all are ways better than morpheus.

PS: another reason not to use morpheus: e-mail them for support and you´ll never get any answer!