I like OSM and have also contributed to it. However, I would be wary of using OSM for navigation. It's very easy for someone to mis-edit (accidentally or malici

I like OSM and have also contributed to it. However, I would be wary of using OSM for navigation. It's very easy for someone to mis-edit (accidentally or maliciously). Also, it is difficult to revert a mis-edit because, unlike Wikipedia, the data is not chunked into pages and there are no simple textual diffs which a non-geek can review.