Yes I came across dirtyracoon, unfortunately I don't have ubuntu.
Honestly, I love my evo. I would get the one but the soft button arrangement bugs me since the home is not in the middle.(yes I'm being picky) Also, I honestly think I would not use blinkfeed despite all the good reviews about it. Reviews have said the s4 has too many features, for me I would not use most of them. I have read that all the features take up a lot of storage space since you cannot move apps over to the SD storage. If I had my way I would get the s4 Google addition :-) ...darn gsm only. If I go the note route then I will wait for the note 3, hopefully it will be octo core :-P All this is just my open opinion, both are great phones. I am in no way putting the phones down.