For those of you experiencing bad battery life and/or witnessing high "Keep Awake" times, an issue/defect has been filed on code.google.com:
Issue 22878 - android - Galaxy Nexus ICS 'Android OS' High Battery usage - Android - An Open Handset Alliance Project - Google Project Hosting
Apparently, many Nexus S owners have chimed in claiming their battery life has taken a turn for the worse after upgrading to ICS. I suggest folks click the link above and "star" this issue so that it gets elevated to high priority. You can "star" it by clicking on the star next to "Issue 22878".
Issue 22878 - android - Galaxy Nexus ICS 'Android OS' High Battery usage - Android - An Open Handset Alliance Project - Google Project Hosting
Apparently, many Nexus S owners have chimed in claiming their battery life has taken a turn for the worse after upgrading to ICS. I suggest folks click the link above and "star" this issue so that it gets elevated to high priority. You can "star" it by clicking on the star next to "Issue 22878".