If you're looking for an email marketing provider that's in the New Light, then MailChimp is it!
They're an awesome, relatively new company that is ethical. And they happen to be the only company that has an unbeatable free plan of 2,000 subscribers and 12,000 mailings per month!
They have all sorts of other plans to suit every need, including a pay-as-you-go plan.
Check them out: http://mailchimp.com