I've also been intrigued about the owner of archive.is and have looked in to it a couple of times but what I managed to find is pretty much all the same stuff as mentioned here.
One interesting thing I'd like to mention are these tweets[1] by archive.is when he was supposedly questioned for something at the finnish - russian border and as a result he blocked the entire site in Finland, although later he lifted the block. I also couldn't find any information about the "Russia vs. http://archive.org case" he mentions in the tweet.