Of course, except in one case, the people proposing them haven't put any money up, so I suspect most of these ideas are just kite flying or wishful thinking.
Arthur's Seat. The original double chairlift was 40 odd years old when it had a few problems and was decommissioned in 2003. Sadly, the new 2004 chairlift suffered from the poor reputation of it's predecessor and closed in 2006. There is now a proposal for a new mixed lift with both gondolas and quad chairs. Unlike most proposals below, this one has serious backers, so it will probably be built. http://www.heraldsun.com.au/news/victoria/arthurs-seat-chairlift-to-undergo-5m-facelift/story-e6frf7kx-1225945454193?from=public_rss
Marysville. to Lake Mountain. An exercise in wishful thinking with no apparent backers or economic justification. Still it would be brilliant if, (in defiance of all sensible considerations), it was built utilising some of the surplus bushfire recovery funds.
Mt Buffalo. Another pie-in-the-sky project dreamt up by the local tourist committee, but also without much commercial justification. But if it was built, the view would be awesome! http://www.theage.com.au/travel/travel-n...91111-i9yj.html
Falls Creek. The ski resort's long term master plan suggests replacing the relatively short (475 m) Gully triple chair with a 600 metre long Gondola. While most usage of this chairlift is by skiers, it does get used a bit by pedestrians for cross town access. http://www.fallscreek.com.au/ResortMasterplan Warning, big file.
Mt Buller. Proposed in the master plan for the ski resort to connect the day car park with the town centre. This plan makes a little more "real world" sense than the Falls Creek one. http://www.mtbuller.com.au/uploads/file/Draft_Resort_Master_Plan_15_SEPT_10.pdf Warning, huge file!
These are the ones I've been able to track down websites for. But there may be other gondola proposals out there.