Ice Cream Sandwich SDK ROMs already in the works | Android Community
Originally Posted by BrandonOptimus
If you really want to see how ICS would look on the optimus then download the launcher first. It looked good to me. But I'm pretty sure no one is going to go really quickly with making an ICS rom on the optimus, I give it more than 6 months before anyone tries to pull a custom rom that looks like it on any type of phone. But for right now I must wait until the Nexus comes out, from what I heard, that phone is truly the future of Android.
Cyanogen developers will roll out CM9 shortly after Google releases source code. As soon as that happens the optimus developers will be able to start to compile CM9 roms.