RSS Feed for posts (entries) http://sacerdotus.wordpress.com/feed/
All WordPress blogs have multiple RSS feeds and you can read about them here http://en.support.wordpress.com/feeds/
See here for more Video: RSS in Plain English http://www.youtube.com/watch?v=0klgLsSxGsU
Firefox has a built in feed reader but Chrome doesn't so a feed reader extension is required. Here's the link for that extension https://chrome.google.com/webstore/detail/nlbjncdgjeocebhnmkbbbdekmmmcbfjd