i agree completely and group platforms is one market we are trying to address in that Fridge groups are super easy to create, invite friends, and share/socialize.
one thing we are rolling out soon is gmail and google group contact import.
In my point of view, it should be possible to use a Fridge as a mailing list, I mean, at least, I should be able to answer comments by e-mail. It is already possible to do this on Facebook. This would help to introduce The Fridge to middle aged people who are proficient in email but don't want to "waste time" in learning new technologies. I'm thinking in small businesses.