The 2010 Lexus RX 350 & RX 450h have now been added to the 2009 recall that addresses the possibility of unsecured or incompatible floor mats entrapping the accelerator pedal.
2010 RX owners will receive notification by first class mail in early August 2012, and Lexus dealers will perform the recall fix at no cost to the customers.
For detailed information, you can get details on the Lexus website or call the Lexus Customer Satisfaction line at 1-800-255-3987.
Update: In my haste to publish this story, I mistakenly included 2013 in the title rather than 2010. Sorry for any confusion.
Update 2: The 2010 RX recall has also been extended to Canada.