As far as I know, some clients support HTTP browsing. So you can use MSIE or Netscape to view the content (when running phex try this 127.0.0.1:6346 if your port is 6346), but because so many people leech a lot (search engines were allowing normal web users who dont share anything leech access) they make it option and so far, from my experience, most hosts turn it off. The only way to find out what content they have available is threw normal gnutella searchs.