Hi Joe, since HTML FORM tags cannot be used within mojoPortal, I've been spending much of my feature development time so far replicating functionality of our existing HTML forms that send to external sites (searches, external newsletter subscriptions, etc.). So far I've had to create four of these individual features, and as this list grows so will the maintenance load.
I started considering whether I could develop a "master" generic feature to replicate the functionality of HTML forms, and what that might look like. Then I realized that Form Wizard Pro is probably 95% of the way there already. This may be naive, but it seems all that would be needed is to add a URL target, the method (email, get, or post), the ability to create hidden fields with default values, and of course the code to support get/post. You probably also wouldn't want to log data entered on get/post forms either.
I used this solution for POST in my custom features. This is pretty old, so I'm not sure if this is still the best method to do this.
Thanks for your consideration,
Jamie