There have been multiple copies of Desktop Manager 4.3 showing up on Vodaphone’s website and others but RIM has finally released the download on their own website at this link. You have to click on the link “Download BlackBerry Device and Desktop Software” and then select Desktop Manager 4.3. There is both an English and Multilanguage version for all you international users.
Note: I have been reading about quite a few bugs in 4.3 including one where it does not backup third party software with the switch device wizard so upgrade at your own peril! 
