If we already had a curl lib (didn't know we have snoopy already), we should continue to use it, if the plug-in developers need other functionalities, they can include other libs in their plug-ins. I will test the new snoopy, and may do some hack.
Zend_Http is great, I really like the API, it has a Zend_REST and GData libs too, which will can help develop GDocs and the other RESTful plug-ins, but we need to introduce more Zend Framework files to Moodle, is that OK?
I found a Easter eggs: womenslib.php 
Created a curl class to simplify the use of curl.