Wouldn't it be good, if those Web sites that list updates for software (such as this site, or other sites with an RSS feed) only list the software that you might be interested in, because you've already installed it? You can get that by simply filtering their content automatically in your RSS reader. This will work with any RSS Reader program!
Initial Release. No installer provided - you will need to install yourself (it works as CGI script or cron job). Please check the installation instructions
Running Web server (Internet Sharing --> Web Sharing "on"), and a bit of Terminal know-how. Alternatively, install as cron job.