I installed Hulu Desktop for Linux recently, but could not get it to work. When I ran huludesktop, a dialog box would display saying that the Flash plugin could not be found and that I should edit ~/.huludesktop.

The ~/.huludesktop file has a INI-style syntax and has a section for Flash settings:

[flash]
flash_location = (null)

It's not obvious whether the flash_location variable needs to be set to a directory or a full path. I tried both /usr/lib/flash-plugin/ and /usr/lib/flash-plugin/libflashplugin.so. Neither of these worked. I didn't find much help via Google, but kept experimenting until I found a solution that worked:

flash_location = /usr/lib64/mozilla/plugins-wrapped/nswrapper_32_64.libflashplayer.so

When the 64-bit Flash plugin is officially released, this will probably become unnecessary. In the meantime, Hulu Desktop works!