He wasn't just a gun rights advocate, but was one of the very first Hollywood celebrities to publicly speak out against racism. Heston also participated in the 1963 civil rights march with Martin Luther King.
Not holding my breath that it'll happen, but I'd be interested to see how much class and restraint the left side of the blogosphere will exercise over the news of Mr. Heston's unfortunate passing.
Update (8:36 am): Well, that didn't take very long. You can always count on the unhinged at DU to come through.