At least some of their content:

Chase Carey, News Corp.’s deputy chairman, suggested in comments he made at the OnScreen Media Summit that it’s just a matter of time before Hulu, the video service founded by News Corp. and NBC Universal, launches a subscription service.
“I think a free model is a very difficult way to capture the value of our content,” Carey said, according to a report Broadcasting & Cable, which co-hosted the conference. “I think what we need to do is deliver that content to consumers in a way where they will appreciate the value…Hulu concurs with (the notion) that it needs to evolve to have a meaningful subscription model as part of its business.”
Asked when Hulu would roll out its pay model, Carey, who has been to only one News Corp. board meeting since his recent arrival at the company, was less sure. According to Broadcasting & Cable, Carey thought the move would likely be made in 2010. He acknowledged however, that no timeline had been set.

Bummer! Hopefully, this is just a two tiered system and shows like Bones will remain free, otherwise this is my cue to watch less TV and read more books.