If you don't see numbers in the # column, just means there's one host sharing that file. Don't let that stop you from downloading (although you'll get faster download speed if you choose a file with multiple hosts)!!

If you try to download something & you get the "need more sources" msg, it usually means that the source(s) are offline & you're better off to start a new search.

This thread has a heap of info about how to configure LW for optimal performance (hopefully increase your dld speed in the process - although this depends a bit on your speed, host speed, host connection, number of hosts you download from etc etc).
http://www.gnutellaforums.com/showthread.php?t=27036