No offense intended, but polls such as this (and this isn't the first one on this topic) are meaningless. Few Roku Digital Video Player customers come to these forums at all, even fewer actually have logins, and out of those that do few actually participate. You could probably get enough people together for a poll here advocating just about anything this way with it not really being representative of the customer base.
I understand the desire to incorporate more video sources as I want more too, but multiple threads/polls advocating something will not necessarily make it so.
As others have mentioned, there are likely things none of us truly know the answers to such as whether it is technically possible to have Hulu on the Roku player, whether Hulu is willing to work with Roku at all, etc. For whatever reason, Roku isn't talking and I don't expect them to until they are closer to a deal where they can make an announcement as they did with Amazon.
It may actually be a better strategy to go tell Hulu you want to see them on the Roku player as I am pretty certain by all the threads/polls here that Roku already knows!