How do I log into this forum with my old Bloggingheads (Phorum) username?
Phorum passwords are encrypted and so cannot be transferred out of Phorum. (This is for your own protection.) So you'll need to select a new password (or reestablish your old one) in vBulletin by following this procedure:
Try logging in to vBulletin with your old Bloggingheads user name.
vBulletin will tell you "You have entered an invalid username or password." There will be a link to click if you have "forgotten" your password. Click that link.
vBulletin will present you with the Lost Password Recovery Form. Type your email address in the space provided, and click on "Request Username/Password Now."
Check your email for the message from vBulletin. It will include a link for resetting your password. Click that link.
You will be taken to vBulletin, where you will be told "Your password has now been reset and emailed to you."
Check your email again for another message from vBulletin. It will contain a randomly assigned password, and a link to follow if you want to change it. Click that link.
You will be taken back to vBulletin again and presented with a login screen. Log in with the assigned password. You will be presented with vBulletin's Edit Email & Password form, where you can enter your assigned password and change it to whatever you wish.