ArsRSS has implemented a Calls and Opportunities news feed which draws on a database search of up to120 news feeds from art and new media organizations. This feed can be accessed from http://net18reaching.org/artrss/opps.php or from the ArsRSS main page at http://net18reaching.org/artrss/, where you can also link to an HTML version of the Calls and Opportunities feed.
All contemporary browsers will process news feeds, but not all of them are equal in terms of readability and access. Firefox is the least satisfactory. But if you use Firefox and have a Google account, you can use the Google news reader, which you can get to under News/My Account.