Just to be clear, 500M downloads doesn't mean 500M users. Some users download more than once. Some users deploy multiple installs from a single download.
http://weblogs.mozillazine.org/asa/archives/2008/02/on_500_million.html

Firefox reached 500 million downloads this week, and Mozilla is encouraging users to celebrate by visiting FreeRice.com.
http://www.appscout.com/2008/02/firefox_500m_download_party_vocab_quiz_free_rice.php

Congratulations, Skype! Skype users downloaded the world's leading VoIP program 500 million times today. The current rate is 640 thousand downloads a day, according to Skype data ...
http://www.skypejournal.com/blog/2007/02/is_500_million_skype_downloads.html

2pm: Apple's music download service iTunes has passed the 500m download mark, just over two years since it launched. By Dominic Timms.
http://www.guardian.co.uk/technology/2005/jul/18/media.netmusic

LUXEMBOURG, March 15, 2007 - Days after Skype announced that its wildly popular internet communication software has been downloaded more than 500 million times worldwide, the ...
http://about.skype.com/2007/03/celebrating_500m_downloads_sky.html

The last time Mark mentioned Kiwee, the social site that provides attractive (operative word) graphics and custom expressions for your various IM clients,
http://mashable.com/2008/01/23/kiwee-1-million-users/

Skype has been downloaded over 500 million times worldwide, although the number of active registered users for its service is well below this figure.
http://www.computerweekly.com/Articles/2007/03/08/222299/skype-downloads-hit-500m-milestone.htm

Overview Designed to meet the medical packaging industry validation ... PDF Download : Data sheet B-500M
http://www.doboy.com/eng/bagclosing_b500m.asp

Sharing is good. So if you have a comment about this entry please feel free to share. The Comments might be reviewed by our Staff and might require approval before being posted.
http://www.bossaudio.com/support/index.php?_m=downloads&_a=viewdownload&downloaditemid=413&nav=0,2

CUPERTINO, California?July 18, 2005?Apple® today announced that music fans have purchased and downloaded more than half a billion songs from the iTunes® Music Store.
http://www.apple.com/pr/library/2005/jul/18itms.html

PRODUCT FEATURES: DOWNLOADS & MANUALS: SEND TO A FRIEND: SEND TO A DEALER: DP-500M $699.00 Experience the pleasures ...
http://usa.denon.com/ProductDetails/517.asp

CNET's comprehensive Dell Inspiron 500M coverage includes unbiased reviews, exclusive ... and extensive onscreen help files; on Dell's Web site you can contact technicians, download ...
http://reviews.cnet.com/laptops/dell-inspiron-500m/4505-3121_7-21218321.html

Download is starting. Save file to your computer. If the download does not start automatically, right-click this link and choose "Save As". How to get videos onto the iPod or PSP.
http://video.google.com/videoplay?docid=684430133085140658

Below is an example where we copy +500M rows from one database to another one that is ... You can download here: http://www.javaforge.com/proj/doc.do?proj_id=318 or here:
http://www.ibridge.be/?p=42

Muddying the water slightly is Apple's own attempts to drive sales past the 500m mark, which included a monster giveaway to the buyer of download number 500m.
http://www.theregister.co.uk/2005/07/18/apple_itunes_500m/

... News-Lifestyle: Lessons: Downloads: Community: 24/7 Support ... AJ-500M: AJ-500R: AJ-500RC 12-Fret: DR-500M: DR-500P: DR-500R: EF-500M: EF-500R: EF-500RA
http://www.epiphone.com/default.asp?ProductID=224&CollectionID=15

... 1 MB: 7627: 3: 25: 161041: 0: R120895: Dell - Application /support/topics/global.aspx/support/downloads/en ... deviceid=7627&libid=25&releaseid=R120895&vercnt=3&formatcnt=0&SystemID=INS_PNT_CEL_500M ...
http://support.dell.com/support/downloads/driverslist.aspx?c=us&cs=19&l=en&s=dhs&ServiceTag=&SystemID=INS_PNT_CEL_500M&os=WW1&osl=en&catid=&impid=

It recently announced that it had sold 500m downloads. In January this year, it said it had sold 230m songs to date. Apple's numbers don't correspond precisely to the period the ...
http://www.theregister.co.uk/2005/07/22/ifpi_download_stats/print.html

You can download the world mapping data at 500m for free. Download
http://www.atdi.com/download_carto.php

Raster: 500m cells. download page: Metadata: 1:500,000 WWRC: Groundwater: estimated net annual aquifer recharge, statewide. Raster: 100m cells. download page: Metadata: 1:100,000 WWRC
http://www.sdvc.uwyo.edu/clearinghouse/gw_vuln.html