Three Months in Oz

Hi. I'm travelling to Australia for June, July & half of August this year (10 & a half weeks) & am flying into & out of Sydney. The rough plan at the moment is in this order: Sydney, Melbourne, Adelaide, Perth, Broome, Darwin, Cairns, Brisbane & Sydney. Also want to go to Uluru & Alice Springs and wondering if it would be best to go here between Adelaide & Perth, or to go from Darwin and then onto Cairns? Also wondering if Broome & Darwin are worth the trip? We could fly from Perth to Cairns and skip this area altogether & spend more time somewhere else - any info would be great!! We are planning on driving from Sydney to Adelaide, then possibly going on a trip to Uluru & Alice Springs and flying from Alice Springs to Perth or flying direct to Perth from Adelaide if we decide to do Alice Springs from Darwin. We plan on flying from Perth to Broome & then busing it from Broome to Darwin & from Darwin to Cairns and then have a month to 5 weeks to drive from Port Douglas down to Sydney.
Basically I'm wondering:
Are we trying to do too much in the time we have?
Alice Springs from Adelaide or Darwin?
Are Broome & Darwin worth seeing? I'm thinking yes!!
When renting transport: car & then stay in hostels or campervan?
Any help or info would be much appreciated. Thanks!!

Jesus my eyes hurt?!!! Paragraphs ??

Just looking at the place you have suggested I would say your trying to do to much in to short a space of time to be honest

The trip is possible but it would be very rushed, it really depends how much driving/travelling you feel comfortable doing. If you're coming from jun-aug I wouldn't bother going south of Sydney as the weather will be quite cold, people say the great ocean road is fantastic but to me it wasn't, looking at rocks off the coast when it's cold, windy and raining on and off isn't my idea of fun. I would decide what you want to see and then work out the best way to see them, whether it's by tour,hiring a car or van, flying or a combination of them.

If you're after a road trip and the sun then I would hire a camper and head north from Sydney and go up to Cairns, you can visit the Whitsundays, Byron Bay etc on the way. From Cairns I would go west to 3 ways and if you're enjoying the drive then drop down to Uluru, then up to Darwin. It's not so much Darwin that's good, but Litchfield National Park and Kakadu. On the way make sure you drop in at Bitter Springs and Katherine Gorge. From Darwin head west again to Broome, visit the Bungle Bungles, Tunnel Creek and the gorges on the way and from Broome head south to Perth. From Perth fly back to Sydney. You'll need to average about 160km or about 2 hrs driving a day to complete this trip in 10 weeks. See map

Check out my Australia '07 trip, it took 13 weeks from May until August which is a similar time frame to your trip.

If I was you I would skip Adelaide. There really isn't that much worth seeing there.

I would skip Adelaide as well. I went there simply to go to Kangaroo Island.. I was in Adelaide on Australia Day and there was still nothing to do..