OK, a few things:
* one is yes, check in the top left, and see if you are looking for servers in the internet.
* also, if all it says is "Getting info for -1 servers", that means that your internet is eighter down, or not connected to master tremulous.
* If you only get a few servers, (rember to hit get new list, and refresh list periodicly) open your console by pressing the ` button (above Tab) this should pull down your console and it will say something like: 55 servers not listed due to packet pings higher than 800. In that case, your internet connection is eighter really bad, for some reason you are having diffuculty connecting to master tremulous, or your ram is really low.