Is there a FREE software sales, install, and usage ranking list that
is periodically updated?  What I am looking for is something akin to
Billboard's music listings.  Something that's updated weekly would be
ideal, monthly or quarterly at a minimum.  Worldwide would be
preferrable, entire United States at a minimum.  It would be nice if
it included free and open source software like Netscape and Apache
(however i already know about the netcraft survey, thanks).

An example report would look like this (completely bogus, but to
illustrate what i'm looking for):

Sales for the week ending 01/01/1001:
Title           Vendor          Sales         Total installed base
-----------     ------------    -----------   ----------------------
Windows XP      Microsoft       800000        25000000
Office 2000     Microsoft       230000        18000000
Web Server      Apache             n/a        17999901
Photoshop 5     Adobe            51001         1394000
Communicator    Netscape           n/a          210020
... and so on ...

thanks...