What's Ultimately Possible in Physics?

FQXi FORUM: What's Ultimately Possible in Physics? Essay Contest.

The contest is now closed to entries, and all essays are on display. The voting is open until 11:59PM EST, Friday 6 November. So read an essay, ask a question, place a vote!
http://www.fqxi.org/community/forum/category/31416

For instance you might be interested in:

Lessons from failures to achieve what was possible in the twentieth century physics by Vesselin Petkov http://www.fqxi.org/community/forum/topic/592

or

What Is Ultimately Possible in Physics? by Stephen Wolfram 
http://www.fqxi.org/community/forum/topic/596

or...