No, I do not. The Mark as Read command does not light up on any non-Mail folder in my mailbox.
While this really bothered me, I didnt think it would be a big deal for others, but, we are starting to deploy Office 2010 to our users and they are now complaining. The really irritating part is that I do not know when a new item is added now...so I do not know what is new.
I have posted this question with MS back in technical review days, but never got an answer. I have Google'd and the only fix I have found is a homegrown macro that someone posted, but have not tried.
Andrea