I’ve been using a RSS feed aggregator for blogs and news sites for quite a while and I have also been doing the same queries on ADS regularly as well as looking at the updated listings for astro-ph on arXiv.org. So I’m finally using RSS feeds for my standard queries on ADS… simply scroll to the bottom of a result page for your specific search and you will find a link to the RSS feed. On arXiv I’m not using the feed from http://arxiv.org/rss/astro-ph, well I’m actually using http://arxiv.org/rss/astro-ph?mirror=de so that the links point to the German mirror. More info can be found at http://de.arxiv.org/help/rss and http://doc.adsabs.harvard.edu/abs_doc/help_pages/results.html#RSS_Feeds