When I checked the transaction history for the store alt, I got an invite to test the new SL Dashboard. The first impression is graphically appealing and reasonable fast.
The single elements can not be moved around as one would expect. Also the opened/closed setting is not persistant between sessions.
What I like is the direct integration of Xstreet SL under "Merchant Tools". What I dislike is that the Transaction History takes a lot more screen real estate.
If it would be possible to permanently delete elements and move elements it could actually quite useful.
If you want to test the dashboard yourself, but did not get an invite so far, simply add /my/ to the URL or click here: https://secure-web2.secondlife.com/my/