I've installed this extension and checked it quite extensively. I must say it's working really nice - sadly it's unusable.
First of all - despite i18 file, major button text is in Cyrillic alphabet (it's produced by downloaded js - out of the site).
Second thing is the look of the buttons in sidebar. User won't notice it can "share" content, if there will be no visible g+,facebook etc logo. With this extension he (user) can only see logo of Yandex (http://yandex.st/share/static/b-share-form-button_share__icon.png) and/or Cyrillic text - not much use of that :/.
So please change/fix those things - and we will have really nice social extension for mediawiki... Sauron (talk) 18:19, 20 June 2012 (UTC)
This post was posted by Sauron~mediawikiwiki, but signed as Sauron.