I found that at least on my phone the calendar process was taking up all the partial wake usage and the phone was never actually going to sleep.
To prevent this from happening I had to remove my flickr account from the phone. I found this via XDA out of this topic:
http://forum.xda-developers.com/showthread.php?t=666404
If your phone isn't going to sleep and you have a flickr account setup this is probably the fix to get some better battery life. Might want to put this up top. Thanks!