With both e-mails(one before and after the confirmation) are a excellent proof that the e-mail is yours to reclaim your account.
Now you just need to contact their support.
A minimum hope in me was saying that in those confirmation e-mails you would find something like
"username: xyz"
"password: mysuperpassword"

There was no email sent after confirmation. I save all my emails regarding bitcoin transactions and passwords. I am still getting no reply from their support, since the website has not been maintained or updated in over a year. I assume whoever checked those emails when the site was active no longer checks them... and there is a pile on unread messages slowly growing in their support inbox. Sigh...
Any other ways to recover those funds if they never respond to my support requests?
EDIT: The Reddit community has potentially come to the rescue! See here:
http://www.reddit.com/r/Bitcoin/comments/14smbz/recovering_bitcoins_from_an_inaccessible_account/