What I really like about this last suggetsion is the clear concept of working from left to right. On the left hand side you define what you are looking for. On the right hand side you get the results. Filter and places (or containers) are nicely close together. Still missing is the "load filter" functionality.
What I am a bit sceptic about is the available place for the rather complex advanced filter-settings. I doubt we will be able to get them into the left column
Also, I would like to know what other users think about the suggestion from awieland, that we should use the browser-tabs instead of an own tabbing-system to have several states or applications of Tine 2.0 available? I think her argument is quite convincing and would save us a lot of space.
Further I would like to stress the point that Tine 2.0 is not optimized for first-time-users, but for productivity of regular users. Please keep this in mind, when thinking about the suggestions.
All in all, I have to say that I am very happy about the suggestions and the discussion going on. It is great to see so many users being so involved into the development. This feedback really important for us! Thanks to all and keep it on!