Are you using Wordpress for blog, there is an update for you? Elegantthemes.com is releasing a new email opt-in(sent emails to many people at the same time) plugin called Bloom. Every blog is required a perfect email subscription system, that plays the most important role for generating direct traffic. Using Bloom you can create different types of Opt-In(subscription) forms like popup, flyin and etc. and that can integrate with email API service providers like Aweber, MailChimp and etc. just take a quick look at these features.