<b>Editor's note:</b> <em>Jonathan Barouch is the founder and CEO of location-based startup Roamz, developer of social media business product Local Measure.</em>
Foursquare has become entrenche
<img src="http://tctechcrunch.files.wordpress.com/2011/05/tc-soundscape-app-team.png" class="shot2"/> In the early hours of Hackathon day two, bleary-eyed hax0rz roamed the conference hall, checking o