2.3 (Gingerbread) on Atom E6XX series CPUs by January 2012, a full 2 to 3 months after the release of Android's next OS, Ice Cream Sandwich. Of course, by January it's likely that only Nexus phones and maybe Cyanogen users will be using ICS. But, if Intel is only going to have support by January, that means the first devices would be coming even later, and likely by that time there will be a fair amount of phones shipping with ICS.The trouble is that Intel may be starting from behind. The company is planning to have support for Android
Android on Intel x86 architecture has been done before by unofficial channels, but this will be the first official support from Intel. Maybe once it has Gingerbread support in place, the update to ICS may not be too difficult, but we'll have to see if Intel can catch up to the pack.