Status matches with airlines generally require calling to inquire about the possibility, but United Airlines now has a page on their website dedicated for matches requested between now and December 31, 2012.
Primarily targeting American and Delta, it’s open to all competing frequent flyer programs with the exception of those that grant Star Alliance Silver and Gold status (sorry US Airways elites).
Once approved, a newly minted Premier needs the following activity completed within 90-days to retain their matched status for the rest of the year.
Other terms and conditions apply, so be sure to read this linked page.
Hat tip: FrequentFlier.com