VK+ Switcher

If you have for some purposes many accounts in Vkontakte or other social network and got bored using multiple browsers or loggin in/out between accounts, this extension is for you! Locate all your accouts in one browser and switch between them in an easiest way.
Now works in Opera!

FEATURES
Work in different accounts simultaneously (in different browser tabs).
Quick Vkontakte, Facebook, Twitter, Mail.ru, Odnoklassniki and Google profiles switching
Customizable hotkeys, working in almost all browser pages
Profiles ordering
Import/export profiles

Vk group
http://vk.com/club36690152

Bug tracker
http://code.google.com/p/vk-switcher/issues/list