I bought myself a Holga 120 CFN recently which typically shoots 120 Film. Shot my first roll and I'm the hunt for a place to develop... Here's a few places in Sydney that still does 120 film processing.
For 12 shots, 120 Medium Format Film; Fotolab (same day service) quoted me $11.95 to process, $2.20 per 4x4 print (Shop GE, 303 Pitt St. - Sydney Ph. 92833721 http://www.fotolab.com.au/). Foto Riesel (Overnight service, drop by 10am) quoted me $27 for developing and printing. (364a Kent St Sydney 92996745) Other place you can try is Campsie Prolab.
Photo above by SlimJim