Just a few hands of heads-up played so far. It doesn't look like it'll take too long though (gulp - that might come back to haunt me).
On one hand, Taylor Larkin raised to 175,000 only to fold to a three-bet to 480,000 by Michael Linn. Then, on the very next deal, Larkin returned the favor by reraising Linn's button open of 175,000 to 500,000. Linn made the fold.