Over the years, hyperlocal has been tried numerous times on the web by news/media sites in particular, but no one has been able to get it quite right.  A new mobile app-based startup named DeHood seeks to tap into local communities to create what seems like a Twitter/Facebook mashup.  Local continues to be a holy grail of the online world because of the big-time potential seen in local online advertising.  We will see if Palo-Alto-based DeHood can do what so many others haven’t been able to do—perfect hyperlocal.  Here’s a good just-published overview of the company from JP Manninen of VentureBeat: There goes the neighborhood: DeHood builds hyper-local social networks