Nokia will again be hosting its Nokia Developer Summit 2009. This time, the hackathon has ten (10) handpicked ideas out of 1400 submitted worldwide by consumers. Half of these are location based centric and one third has social networking focus!

CellCity – location based public transport
EarthComber – location based siteseeing and events
Mo’Blast – social-location widget
Plusmo – sports-focused social-location widget
Yalla Ya! – social-location widget