Lots of em actually, there's like 1 or 2 of em ranked and many (many) unranked. *cough* unlimited spark *cough*
Just like the official LN chart from the official O2Jam song ; Phase 1 by _spam charter.Electro Fantasy HD was the first song to feature LN patterns, though very simple at most. complicated LN's started to appear on End of Fight. just some additional info
Example video :
I'd like to bump this because I still think this is definitely worth considering adding.