Part of our site requirements:
RepRap in other languages. Mediawikis do this well, and I guess phorum does, inasmuch as one can spawn increasingly fine grained mailing lists.
Also, mediawikis don't do Parts well, especially in terms of languages. For example the delta robot entry that may exist in german might not exist in english.
Youtube and deviant art handles 'parts' quite well, by comparison.
