I ran across this site while doing some research and ended up hanging around for way too long. It's called "What the Nation Thinks" and it's a collection of opinion polls. You can submit polls or take them. Fortunately someone reviews them before publishing (at least they claim to) so there's not a lot of childish attempts to get attention (although there is one up there currently about bra-sizes, but it's actually not a bad question I suppose.)
From the homepage you can look at polls by how popular, "hot", or new they are. There are also categories (which you assign when submitting a poll) or you can search. The interface is really nice and straightforward, as well as easy on the eyes.
I don't know if this is a Web 2.0 kind of thing, but if Digg.com is then I don't see why this wouldn't be. Even though it looks like it started a few years ago. In any event it's a nice way of checking out public opinion and killing a whole lot of time.