Have you tried to connect manually to gnutellahosts.cache.com:6346 ???
This host server is usually always up, even if the other 2 are down.

Make sure your firewall doesn't block the port you run your Gnotella on and try to watch if any data goes out from your computer (sometimes you have those tiny little monitor icons in the system try down the right bottom. They flash on in or out data).

Something seems to be wrong in your setup and no data is going in and/or out.

You may also find, that if you share NO files, nobody else wants you to connect to them.

And make sure you keep at least one incoming conection set.

The gnutella net works very, very good now.

And the 28,000 is actually a bit low. It is sometimes over 50,000 users at any one time.

JD