A letter posted by the FEC suggests that regulation of 527s might be a little bit looser in coming cycles.
The letter concerns the Latern Project, who in 2006 ads painted then-Sen. Rick Santorum as siding with Bush. The FEC decided these ads did not constitute advocacy.
From the Election Law blog:
If this is going to be the standard for what 527s can do in the next election without running into the danger of being classified as a political committee, I expect the next few elections will see a great growth in this activity. I think this ruling will take a lot of fear away from potential 527 donors in the next election.