The changes caused by Excite's collapse did not affect your account. Your password and everything else remain the same, so you will still be able to log in and post.
We hope you will update your profile with your new email address. A new random password will be sent to your new address. You can update that the next time you log onto the forums.
The only problem that could arise is when you subscribe to a thread, or we have to email you for any other reason. When those emails start bouncing back to our mailbox, we may have to take some action to stop any flood of incoming bounced emails. You can help by updating your profile before that happens.
Thanks,
AnandTech Moderator