I have managed to create a system based in PHP which basically completely replaces Aweber for me, and is actually fantastic to use. I have integrated SMTP support so I can send emails directly to inbox, and have also set up tracking like open tracking etc.
Overall, the system has pretty much all of the core features that is required for an autoresponder such as Aweber.
Due to the success I have been having with this autoresponder, I am possibly looking to develop it further, and actually turn it into a system I can sell, so everyone can use it! However, it would be a bit of work to make it usable for all, and I am looking to find out whether it would be worthwhile or not.
The fact that a self hosted autoresponder means no monthly fees (with possible exception to SMTP server), unlimited emails allowed to send, and no stupid limitations like some of which Aweber put on you.
So, would you use a good quality self hosted autoresponder other than a reputable service like Aweber? If so, what would you pay for it if it was really good?