What a great site! I’ve been living in or visiting Indonesia since 1979 but have bagged hardly any peaks – although Gng Merapi (in 1981) was one of them! Now, I just try to encourage others. Earlier this month my son and a friend climbed Mt. Arjuna, in East Java. I’ll ask them to do a trip report. For arranging trips up the mountain (best done as a 3-day hike) I can thoroughly recommend the Village Tourism Association in Tambak Sari, on the slopes of Arjuna. A good contact is Agus Sugiarto (Sugi), suge_eling@yahoo.co.id.