Regarding Daduchus's comment below:
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A real problem, though, is that even though I set my privacy settings so that I don't show as being logged in, I still see my login listed on the front page of the forums. I'm hoping that changes when I log in again.
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Go to Settings > Preferences > Privacy . .. and select the "No one" radio button in the "Show Online Status" section and click Save. By doing this, no one else in the community will be able to see you online.
Please note that you and you only will still be able to see your name in the "Users Online" side-widget. But, no one else will be able to see your name here. Hope that helps!