Over the years, I've used a couple of notification (mailing list) services, and they either close up shop after a while, or don't like the nature of what I'm sending out, so I decided some time back to just send out notifications myself from the north@bound2burst.net e-mail account. When these go out, the recipients all receive a blind CC so no one sees anyone else's name or e-mail address. I don't ever sell mailing list information either; it remains completely confidential. So, if you want to know when the B2B website & store have been updated, just drop me a line and I'll add you to the list.
Dave.