Full version now outside of beta. Full iCloud support for sync and a great deal of cross platform support.

lots of bug fixes
can paste images into new tweet window again
can copy tweets on timeline
can do ‘open in new column’ (they also have keyboard shortcuts)
multi-column swiping and keyboard support much improved. Use tab shift/tab to move between columns.
better keyboard support: status detail + many other views
profile view: can scroll user information so can see more tweets
drag and drop tweets has been improved
gap loading works properly now
context click on tweet action buttons in timeline
did I mention we fixed a bunch of bugs too?