UPDATE: CM7.2 official is confirmed for Samsung Galaxy Ace & will roll out with the official 7.2 of all devices. More info
Why no nightlies?
Due to insufficient computing power available, the nightlies haven’t rolled out for SGA.
What about CM9?
If Samsung doesn’t rolls out ICS for Ace, it will be nearly impossible for an official CM9.
Samsung Galaxy Ace has finally pulled it together. Expect official CyanogenMod Nightlies soon at the official website. No more betas by XDA devs. When all the bugs in nightlies will be sorted out, an RC version will follow and then a stable one.
More Information: http://review.cyanogenmod.com/#change,7133
New nightly build for download will be available here as device name ‘Cooper’ (Within a week maybe): http://download.cyanogenmod.com/?type=nightly
So keep a little more patience. We will keep you updated.