So the fantastic deal posted by CrocDundee here https://www.ozbargain.com.au/node/538080 has been marked as expired so we are no longer able to discuss the best Feed in Tariff available.
This thread is for people to monitor and discuss what they find in achieving the best possible plan for their power needs, specifically in relation to solar feed in tariffs.
This thread is in specific relation to plans available in Queensland, as per the original deal linked above.
While some may be available in other states, this isn't always the case.
Note that if you don't export a large amount of power, that having a large FiT with higher usages fees might not be the best deal for you.
I will continue to update this main post with any information people find useful, however the latest actually deal should be found within the comments.
Whirlpool forum thread
https://forums.whirlpool.net.au/thread/91j6xnr3
CURRENT MOST LIKELY BEST FiT FOR QLD
Easily accessible : ?
Best: ?

MASSIVE UPDATE!!
So I just called Origin retention's team (the 1800 number) this morning to help my friend go on the 12c FIT uncapped plan (his plan was due to finish by the 18 May). The retention team member said that he was being migrated to the new system and that they were not able to put him on the 12c plan (which is still available by the way) and had to be dealt with by a different team. I was then transferred to the new department who are looking after everyone migrating over to the new system - Long story there which I will update another time…
So this new system's person had access to several offers, including 12c FIT uncapped but the lady said on the phone that she could see an offer there that said 17c FIT uncapped - DO NOT TOUCH… She said she would need to speak to the supervisor about it and call me back. She called back 15mins later and said she got approval to put him on the 17c FIT uncapped plan and processed that for me, on my friends behalf, locked in for 12months starting today.
I then asked if I could go on that same plan! She then logged into my account but said I was still on the old system and that she didn't have access to change my plan until I was migrated over to the new system. I then tried the retention's team number again and they said until I've migrated over to the new system, the best they can offer is 12c FIT uncapped. I have to wait til I've migrated over and try again with the new department. They can't see what offers other departments can give.
Long story - sorry! However, there is hope of at least getting back to the 17c FIT plan. I just have to wait til I migrate over to their new system. You can bet your bottom dollar that I'll be calling up everyday now asking them to change me over to the new system!! Apparently they can't manually do it and is just gradually with all their customers. My friend was just lucky enough to be one of the earlier ones being transferred over.
I'll keep you all posted on how I go but in the meantime, check to see if you have been migrated to the new system and argue the case of getting the 17c FIT uncapped plan!
Good luck everyone!