Yeah, I do not expect standard Hulu to ever be 'allowed' on any set top box.
As a matter of fact if Hulu Plus becomes relatively popular, I suspect standard Hulu may go away entirely.
Out of curiosity, do you know if PlayOn supports HD content for Hulu? And if so, are there serious performance issues versus viewing on a browser?
I actually have a PlayOn license, but have never tested HD content using it - mostly due to the lack of HW performance of my server. It is currently in a coma, and I plan to build a slightly beefier unit over the winter.
Also, do you know if PlayOn can aggregate Hulu and Hulu Plus content similar to how Hulu desktop can?