classfieds admin addons

We need some features to be added to our classifieds. 1. We need the user to be able to edit/delete his/her post after it was approved. 2. We need users to be able to sign up for email notifications for the chosen topics. (I.e. when the new post appears under the topic they selected, they are receiving email which notifies them about it) We will not be able to give you the access to ftp, so you'll have to work offline. We need this to be completed ASAP. We would prefer if you have any type of instant messenger for communication during project. Skype preferred.