Is there a way to delete your account?

No.

How do you delete an entire account?

You can't.

The usual advice is to go through your blog deleting or hiding all your articles, change your stored email address to something nonsensical, and change your password by pounding blindly on the keys -- so you can't get back in.

Delete all your articles. change the blog title, names, etc. If you really want your blog gone, make it gone.

You should email their support and request your account be deleted. It is unlikely to be legal for them to hold any data on you that you explicitly request that they remove. There should clearly be a simple delete account feature to adhere to best practice marketing guidelines.

Just ask them to nuke your account. I'm sure they'll be gald to accomodate you. They don't get to use that feature often.

Is there a way to change the email in my account?

I can nuke your blog...just don't ask for it to come back   send me a Private Message if you really want to do it.

bl00bername, you can change your email address through this tool: https://www.stardock.com/accounts/accountsetup.asp?SDID=1&Hide=True
Just log in, then you will be able to manage your account.