Pre-release version of Magento Community Edition 1.7 is out. Many of us are expecting the final version as there are some very good new features. If you are going to start developing your Magento store now it is worthy to wait for 2-3 weeks so you can start doing it...
EM Newsletter Opt-In FREE Magento Extension
EM_NewsletterOptIn is a FREE Magento extension that automatically adds a check box "Sign up Newsletter" on the checkout page in the billing section. Check it on the Extreme Magento website to see it's full features and live demo.