The HTTP POST is a really powerful thing but there's not much documentation on it. In this video I'll explain briefly how to use it and explain some of the options you have when sending httpposts's out of Infusionsoft.
Try this sample from one of your contacts in Infusionsoft: http://dev.jfkeen.com/dev/testing.php?admin_email=PUTYOUREMAILHERE if you add your email, you'll receive an email containing the values that were sent. Once you have your script working, the HTTP POSTyou create can be used on any action set which can be added to a form or put on sequences or credit card triggers. Nearly everything in Infusionsoft has the ability to set of an action and an HTTP POST can be part of any Infusionsoft action set.