Plugin for Sending Email to Readers about New Posts? (besides “Subscribe2 “)

I wish to have a “subscribe to new posts” widget for my blog.

I know I can use feedburner system, but I want a plugin based solution.

The best I could find was Subscribe2, the downside of it is that you can’t have it send full HTML e-mails for subscribers who are not registered users.

Is there any alternative plugin, or solution that can do this (maybe a work around based on the GPL subscribe2 plugin?)

p.s: the solution need to work with WP 3. So the plugin Subscribe2 for Social Privacy, that is supporting up to WP 2.6, is not a good answer.

The best WordPress plugin for email subscriptions to your blog without using third party services like Feedburner is the WP Responder Email Newsletter and Autoresponder Plugin