Facebook founder Mark Zuckerberg has been one of the most visible private sector advocates for immigration reform this year. But, not surprisingly, much of his legislative advocacy has related to skilled worker immigration issues that directly impact Facebook. To the extent he has backed broader immigration reform, it has been seen largely as a way to advance skilled worker immigration. But Zuckerberg has lately been more vocal on the plight of illegally present immigrants and this week showed up for a film premiere of "Documented" which is a documentary on the plight of DREAMers. Immigration advocates are hoping Zuckerberg can help galvanize support in the tech community for other parts of immigration reform.