That problematic Limbaugh billboard in Tucson? It's been taken down. Here's the statement Clear Channel sent to TPM:

Starting several weeks before the recent tragic incident in Tucson, Clear Channel Outdoor had been displaying an ad campaign created by a local Tucson talk radio station to promote its broadcasts of Rush Limbaugh's nationally syndicated radio program. This particular ad - which used the common expression "straight shooter" to describe Mr. Limbaugh's candid and direct style — was designed and contracted for by the local station's promotion department - not by Mr. Limbaugh's program. In the wake of the tragedy, Clear Channel Outdoor management in Tucson quickly elected to take down this ad - believing that discussion of its interpretation would not contribute to the desire for healing in the Tucson community.

Thanks for the heads-up, Towleroad.