The improvements you can find here http://www.limewire.com/english/cont..._history.shtml so you can always bookmark this page to see what is happening with the newest version if they have gotten around to updating the documentation.

Get LW from here (unless a pro user): http://www.limewire.com/english/content/download.shtml

Or get the beta from here (unless a pro user) : http://www.limewire.com/english/content/beta.shtml

Pro users get official & beta releases from their own personal pro download page!!!