Thingster Event Posts

Thingster has a cool way of publishing information. Whereas blogger and typepad et al make people fit whatever content they are publishing into a single box of html munge, thingster lets people choose which type of content they want to publish, and then provides the appropriate form for entering the info.

Here is a screenshot for entering event information.

Interesting is the way the location is described. Does anyone know how the user provides/picks the lat and long value?