Besides if you really just wanna leech than Newshost isn't gonna be that beneficial to you. Here's what I do.
#Register at an international NZB site (Merlin's portal, NZBMatrix and United Forums are all usable and have your favourite Linux distro)
#Download NZB's with your int.
#When int is up start the downloading (hopefully you're on SAIX, so the speeds aren't too bad).
#Go to www.myisp.co.za sign up for their free bandwidth.
#Download NZB's as needed.
Another route (that I like, but others don't) is to download the headers straight of usenet and browse to your hearts content. What I like about this method is that you don't have to jump through the hoops of normal NZB sites and you're more likely to find something there that isn't listed on NZB sites.
If you have Linux (it works on windows too, but you'd have a lot of disparate downloads) you can do it with urd (http://www.urdland.com). It works beautifully.
I like a mixture of NZBs and torrents. I take NZBs for older stuff 'cause if it's too old, torrents won't have any seeders and, if I get it, there probably won't be enough leechers to allow me to seed back. But overall I prefer torrents partly because my news server client sucks. Anyone wanna recommend something a bit better than Grabit?