opt-in newsletter form plugin

Hi,

I’ve been trying without success to find a plugin that will allow me to place a simple opt-in form for a newsletter on my blog. You’ve seen them before, web sites that have a box where people can type in their email adress to subscribe to a site’s newsletter. All the subscription plugins I’ve found up to now have been for letting people subscribe to specifric posts that have been commented on or allowing site owners to send out emails that contain copies of posts to subscribers. This isn’t really what I’m looking for, although it would be nice to find a plugin that will also allow me to type out a newsleter and send it out within the WordPress admin screen. Perhaps something that will log all the people who opt-in to my newsletterand then allow me to automatically send out the newsletter to everyone on the list. Is there anything like this available? Thanks.