WordPress MU support
Now plugin works with sidewide activation. Other blogs in this case receive access to plugin and settings and able to configure parameters. In case of separate activation in the single blogs no different with common WordPress.
Now you can define what roles can use the plugin. Internally new capability is inserted and roles just receive or not the capability to use the plugin.
By this parameter you can manage access to plugin for your authors and editors.
User level for Picasa access data
Before access username and private access token was once per blog. Now you can change blog level data store to user defined. And every user can set his own Picasa username and able to ask Google for private albums. Of course, only if administrator alllow access by roles