Not working for me either, and honestly I'm not surprised.
After receiving my Roku box it worked flawlessly for about a month or two, and within the past month or so, the majority of the time netflix refuses to work (and yet other channels work fine)
Keep in mind this is with a perfectly adequate internet connection that can stream netflix to other devices without a hassle, after unlinking the player, doing a factory reset, re-linking the player, re-adding the channel, rebooting the router, and trying multiple free DNS alternatives along with my ISP's provided DNS.
With Netflix being Roku's flagship service, and the main reason I bought the device, I must say, I am very highly disappointed. Before I would have recommended it to others, but not so much now. If all the other channels work fine, I see no reason why the netflix shouldn't? I know the problem is not on my end. I have spent hours upon hours assuring that.
But looking back, if I could go back and spend that $60 I spent on the Roku HD towards another similar device, not Roku, I wouldn't hesitate. I can deal with a few problems every now and then, but the problems are constant, and it's to the point to where I turn it on and I actually expect Netflix NOT to work, and am surprised if it does.
With Netflix being my only subscription service, and not including a couple decent free channels such as YouTube and Crunchyroll, without Netflix the device is almost useless to me.