As you've no doubt noticed if you're logged in, you'll have a message at the top of the screen saying you need to verify your email. As part of our server move we've had to update a lot of our email practices, and marking all emails as unverified was a necessary part of that process. Just click the link and you'll be able to verify your email.
Let me know if you have any issues. Updating your email in your profile will also prompt a reverification, but note you cannot do this more than once an hour.
You also now receive emails when people reply to your comments on blog post comments which wasn't enabled before. (Assuming you have the option selected in your profile)
If your verification failed, try again now, it should be fixed
EDIT: We haven't moved servers yet.