One plan being considered by Hulu would allow you to watch the five most recent episodes of a TV show for free, while the back catalog beyond that would require a $5/month subscription to access. They're looking to include at least 20 shows in the package to make it appealing to users, but of course the issue won't be how many. It'll be which ones.
This all comes on the heels of Boxee's announcement yesterday of plans to charge for premium content, and Pandora's pay service announced in May. Five bucks doesn't seem like much, but it does all start to add up. [LA Times via Business Insider]