The Hotlist is a ‘geo-social aggregator’ that tells you ‘what is happening around you at any given point in time’. The service pulls in data from sources including Facebook, Twitter and Yelp. ‘A unified geo-database would simplify things,’ co-founder Chris Mirabile said a day before the launch of Facebook Places.

Location-based recommendations network MappyFriends is planning to launch mobile Android and iPhone applications later this Summer. Dutch founder Philip Hordijk arrived in New York, via Buenos Aires, six weeks ago. “Dutch people are risk averse,” Hordijk says, visiting Blenderbox‘ Rooftop Tech Talks.

MeetMoi spin-off Xtify offers an SDK that lets developers integrate geo-targeted messaging into mobile applications. ‘We need to work out the issues of all this fragmentation,’ says CEO Josh Rochlin. ‘Noone truly yet gets it.’

Real-time matching engine YouHaveIWant positions itself as an intelligent alternative to Craigslist and eBay. Founder Vikash Panda explains how YHIW plans to build up its user base.

Foursquare co-founder Dennis Crowley was one of the panelists late August at a Future of Hyperlocal City Guides discussion, along with Prximity, Buzzd and Mapcidy. Crowley previously founded Dodgeball, which Google ‘left out to die’.