A few days ago I had posted on how Hulu was blocking Flash 10.1 on Android 2.2 Froyo based devices due to licensing issues. However, for every block there is a workaround and it is the same with Hulu.
A recent post on Absolutely Android has instructions on how users can access Hulu on Android 2.2 Froyo running Flash 10.1. The detailed instructions walks you through changing the Android browser string to use a desktop UAString in order to trick Hulu into thinking that you are accessing it from a desktop.
The hack will only work on Android 2.2 with Flash 10.1 installed. If you do not have Android 2.2 yet, check out how you can root Nexus One to install Android 2.2, you can also download a manual update of Android 2.2 for Nexus One from official sources. You will also need to download Flash 10.1 for the Nexus One.