I dont think the majority of IS users are people who live off news, IS has been around a long time, and news binaries only really got noticed when people posted in this forum and irc, word of mouth etc...
no hope in hell if IS threw their news server out the window would they go out of business.
Sabnzbd is pretty cool, I use it as my client in windows, its kinda weird adding nzbs and checking status by using internet explorer. If I set it up right I can access it via my cellphone (Wap), just switch its port to 80 and setup a dyndns or similar system.