Hi,
during the 30C3 Congress [1] in Hamburg - where neither Wikipedia Foundation nor MediaWiki were formally present this year (but should be next year)- Jacob Appelbaum [2] - core member of the TOR project - complained in one of his numerous talks that the (edit) access to Wikipedia via TOR is not possible.
He requested that a way should be found to enable the TOR access including edit access to Wikipedia.
I am just the messenger of this message.
Regards, Tom
[1] https://events.ccc.de/congress/2013/wiki/ [2] https://en.wikipedia.org/wiki/Jacob_Appelbaum