Per the author/designer on his personal blog, the official Runebearer website is no longer online and the Runebearer RPG is no longer actively supported by him due to what is perceived as a lack of interest. Full blog post is here (including a Dropbox link to an archive of the Runebearer RPG files):
Hey everyone, just to clarify, the website IS down and I am not too anxious to get it back up and running. However, I am still supporting Runebearer and indeed, I am trying to finish the 3rd Edition. Mostly current rules are on this site and stored in Dropbox. Please drop by my d12 blog for more information and links.