Cant find usefull plugin for new posts email subscription

Hi, im looking for Wordpress plugin which will do this.

Gues visit my article from category "Slimming" and he likes it, and he see field to enter his email to subscribe new posts in this category.

I think it is very usefull plugin, anyone knows such a wordpress category email subscribe plugin please?

 

Hello, check out Subscribe2.

 

Reply to your PM: You can also use Feedburner to let unregistered users subscribe to your posts via e-mail. AFAIK there is not any plugin that would handle that for unregistered users.