YouTuber and pianist Jordan Tommy has some great piano covers up on his channel, some doing renditions of Vektor and Nile, and some touching on Revocation. His most recent upload is a cover of Revocation's "Monolithic Ignorance," and Tommy really does the song justice by tossing in some neat additional chords and harmonies in with the song's otherwise shreddy usual self.
Here's the original, for comparison.
[youtube]https://www.youtube.com/watch?v=wTdDCPLjt70[/youtube]