On the next sunday we have the first micro mapping parti in Milano.
The party will be an attempt to map a very small part of the city.
A 2 hours ride to cover the entire area and to produce a detailed section of the map.
The editing part of the party will be a personal@home task.
Further info (italian ony) at

http://wiki.openstreetmap.org/index.php/Milano/Micro_Mapping_Party