I wonder if anyone has had experience with this?

I want a fully-automatic PHP script that will submit an article on my CMS to EZineArticles, Articles Base etc.

I know EZA has an API and some examples, so that will be easy.

I guess with Articles Base it's all about sending CURL requests to simulate a browser interaction, and then sending any CAPTCHA codes to a service. I imagine the same of other decent directories.

Before I start I wondered if anyone has written something like this and vouch that it is possible, or found there was a big roadblock along the way?