you mean right up the top of the page? and it has "your email address|Dashboard|Sign Out" on the righthand side, and search blogs, flag blog, next blog on the left?
if so...
that's because you've logged in, when you haven't logged in it gives you the option to sign in instead of showing your email address. when I look at it when I'm signed in, it shows my email address. No one else sees it, it's like your individual control panel strip when you're signed in.
hth
