I haven't had the first problem with my 24 ACD and my new mini. I am not saying that people aren't having issues with them because clearly they are, but you can't make a statement that the cinema displays do not work with apple's new hard ware because that simply isn't the truth. I'm using one right now.
They are reporting random flickering and occasional black screens ( none of which I have had).
It may work for a few people, but I wouldn't consider a product fully 'compatible' if there are more people with problems then there are success stories.
I am happy the display works for you and the other fellow. However, myself and plenty of others will not spend $650 give or take for something that only 'might' work. Same for if I already had the display and wanted to get a ThunderBolt Mac, no one is going to spend $1200+ for a computer if it possibly wont work with their existing hardware. Which is why I am not saying it is fully compatible, because it isn't.
Granted, it is an older product and Apple is not forcing us to buy it, but it is only a few years old and Apple said Thunderbolt is completely backwards compatible with MiniDisplayPort and all the old displays will still work on everyone's mac, which is not the case.
I would wait until Apple fixes the issue through the software update. I do doubt that it will be fixed through a software update because there are clearly cases where the 24" ACD works with the current software. I certainly hope a solution does come through.