OpenStreetMap has only recently been added to translatewiki.net and it is a success. Several languages have been completed, localisation for many languages has started and for some languages the localisation has been proof read.
The first batch of localisations have gone live and the result is good. I found that the Dutch localisation is really good and I changed the language in my preferences..
With the process of getting localisations to OpenStreetMap pretty much under control, Siebrand and Ævar decided to add support for the Potlatch editor. I am really pleased that OpenStreetMap is doing superbly at translatewiki.net.