Two times I've encountered this nasty little phish/scam surfing the web. I feel its something that should be thrown out there in case others are curious about it. Hopefully something is done about this one soon since it really does mimic Norton Antivirus/Security well enough to scare some people into falling for it. Yes this is fake, and yes its an annoying popup that requires the browser to be terminated manually.
http:// dail2help.com/warning . html