A new location-based startup allows users to pin additional content onto a virtual map.

Flickr and Hunch co-founder, Caterina Fake, has launched a new online venture called Pinwheel where users can leave virtual notes pinned on a map. This location-based startup idea is still currently in invite-only private beta mode, but has already generated a lot of buzz online. Pinwheel allows individuals or groups to leave public or private notes that can then be organized into sets. The note can be a tip, a joke, a fact, a memory or a photo and left for others to discover on the map.

Fake explains that:

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