God's Foreknowledge or Lack Thereof?

The Great but not quite Spacious Blog poses this question, along with (at last count) 75 comments debating the possibility that an all powerful, all knowing, all seeing being might be limited in some form or fashion.

Believe in God; believe that he is, and that he created all things, both in heaven and in earth; believe that he has all wisdom, and all power, both in heaven and in earth; believe that man doth not comprehend all the things which the Lord can comprehend. - Book of Mormon, Mosiah 4:9

If we were able to comprehend all the things God does, we wouldn't need to be here, now would we?