Nope. 64 bit flash is broken with Hulu. There's many threads around the net about it. I know some people report that strangely, huludesktop still works.
I ended up installing the 32 bit flashplayer on my 64 bit box using nspluginwrapper, and it worked ok then.
EDIT: Thread for someone who got 32 bit flash working in Slackware 64.
http://www.linuxquestions.org/questi...are-64-755781/
EDIT again: The poster there couldn't find a nspluginwrapper package for Slackware, but there is one here:
http://connie.slackware.com/~alien/s...pluginwrapper/