@rrhoover - What excites me about Nextdoor is that you may sign up, join your neighborhood, and not find a use case for it at first. But down the road, something might trigger you to re-engage with Nextdoor - eg. your car gets broken into, your dog is lost, you find a pair of keys on the sidewalk on your block, etc. You see a similar kind of latent engagement on LinkedIn.
Admittedly, I tried Nextdoor 1-2 years ago (on the web) and didn't find a use case for myself but imho this is the type of product that's made for mobile (24/7 access, location-aware, etc.). Will give it another try.
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