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Mapzen is an online OpenStreetMap editing program made by Cloudmade. There is also an iPhone "point of interest" collector app.
Mapzen is a mapping tool with a clean, polished interface. It includes a floating pallet which holds the tag details of the selected map features. The data entered into Mapzen is uploaded into OpenStreetMap, which means that one needs an OpenStreetMap account to use Mapzen as well as meaning any private data entered will be uploaded into the OpenStreetMap data set.
A German version of Mapzen is due to for release in 2010 as part of the internationalised and localised versions. 
Mapzen was released in 2009.
Mapzen - Cloudmade
Mapzen POI collector - Cloudmade