One of newer Accomodation guesthouses in Bukit Lawang is GreenHill owned by British Govt scientist Andrea Molyneaux and her Indonesian husband Mbra.
These two very enterprising young people bought the old Queen's building that had been virtually destroyed by the flash flood of Nov 3rd 2003 and completely transformed the building.
After the initial transformation they both decided to provide some unique accomodation high up amongst the trees for their guests.
In the meantime Andrea had a website created and you can see it here at www.greenhill-bukitlawang.com/
Recently whilst checking the internet I came across some very positive experiences from travellers who have spent time at GreenHill with Andrea and Mbra.
You can read these reviews here at www.tripadvisor.com/Hotel_Revi(...)_Lawang_Sumatra.html