If you love HellFire CM7 ROM for Kindle Fire, you will going to love HellFire CM9 ICS ROM for Kindle Fire too. It is based on CM9 Android 4.0.4 Ice Cream Sandwich. And was updated to include latest version of Hashcode 3.0 kernel. So you can enjoy GPU hardware acceleration and other goodies (bugs from 3.0 kernel too).
Do visit XDA website for more information and download the latest build there.
Installation guide ~ How to install custom Android ROM on Kindle Fire with TWRP 2.0? (Video)
Download HellFire Android 4.0.4 Ice Cream Sandwich CM9 ROM for Kindle Fire v1.2 here.