Well we don't have final confirmation but it looks as though Lindsay may not be competing in the 2012 Arrowhead 135 (read further below for more info) as he's officially listed as a DNS and we haven't received further word of plans to jump in late.
However, we can still cheer on Ian, Hal, Al, and Dallas, so keep checking the OCC blog (click on the link near the top of the right hand column on this page) and be sure to check the results page on the official Arrowhead site here, which will be updated with intermediate checkpoint times as competitors pass through them. The first competitors have just made it thru the first checkpoint!