So, I'm a bit biased here. I built the now stale TipList (http://tiplist.com).
It had a lot of the same dynamics as Drawer. And I love the concept. This NEEDS to exist.
It's just challenging to get someone to create the list. Often, the people motivated to create the lists are the people going somewhere, not people coming back from there.
Even though I built TipList (my tips here: http://tiplist.com/mulligan), I still use FourSquare to save info because it's already part of my work flow. It's got all my data so it's easier to keep stuff in there than in another service.
But again, this needs to exist. So I'm rooting for you!
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Paint the Cameras Dead