BBleaks has posted a link for OS 188.8.131.523 for the the BlackBerry 8530. This OS is not an official OS & you should install only if you know what you are doing. This new version is quite a jump from the first one we saw which was .463 . Share in the comments any problems you find or areas where it has been improved.
Download link: http://www.megaupload.com/?d=5Z1EEXYL
Warning: Do not install this software if you do not know what you are doing. It may make your BlackBerry FUBAR or just plain angry. If you want to learn how to upgrade your OS take a look at this instructions. Thanks to Joseph for the tip.