>>>Also, somebody might manually do some systematic revies, and combine similar entries (for instance, in the case of Turkey: Istanbul and Ystanbul seem to represent the same city; the same for Izmir, Yzmir and Yzmyr).
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>>I disagree with this particular solution, names of places are sometimes similar to one another. Where I come from there are towns called, for example, Tepepan and Tetelpan, Jalapa and Jajalpa. Regretably one has to asume that people type their addresses correctly.
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>I think you are right - the revision (if any) must be done by somebody who knows the region.

Check out Russia members. St. Petersburg, my home city, is misspelled in half of entries. We have ~ 10 different variations. There is similar situation with Moscow. Also there are few entries from different countries. At least 3 from Moldova and one from Poland.