I'm using Google Apps for example.com. Before doing so, my example.com email address was associated with a Google account, probably because of Picasa. Upon attempting to reset the password for my address (google.com/accounts/recovery), Google notes that I've got two accounts associated with my address: one personal from Picasa and one organisational from the administrator at example.com.
This causes all sorts of trouble, mainly that I can't associate the email address with a (Gmail) Google Plus account because "an account with that email address already exists".
How can I delete the personal Google account?