Receptor and Engage made some tracks a year or two ago which were basically psy-trance at dnb tempo, "psy-step" if you will. Engage made a few bootlegs of some psy-trance artists but i don't think any got released. Regardless it's a really cool sound, wish more artists produced it.
I can't understand why there hasn't been more 'Psy-DnB'... I'm not a massive fan of Psy-trance, mainly because of the typical rolling bassline in EVERY tune, but the trippy sounds and crazy progressions you get in Psy genres are sick.
Telemetrik's probably worth mention in here as well - 'My Light Year's one of my top DnB albums and I'd say it's pretty psychedelic in places and quite progressive in the way he structures his tunes. Definitely worth checking out!