a href="http://www.nytimes.com/2011/01/29/sports/29xgames.html?partner=rssnytemc=rss"img src="http://graphics8.nytimes.com/images/2011/01/29/sports/XGAMES/XGAMES-thumbStandard.jpg" border="0" height="75" width="75" hspace="4" align="left"/aIf performance in the halfpipe has been dialed back a bit this season, the competition for top talent by sponsors has turned ever more intense. More...