There are two primary submit types that work out of the box in LiveCycle Designer 8.x, Email and HTTP submit.
If you don’t want to use an email client to submit form data, HTTP is a good alternative. Typically a servlet, or jsp is used to receive the submission. This is a straight forward process and there are numerous examples posted on the web.
SOAP: It is possible to submit the form data via SOAP but it is involved. A simple alternative is to submit the data via HTTP to a web server and have the web server make a SOAP call on your behalf.
Here is an excellent article on how to implement a solution using Cold Fusion and HTTP submit: http://www.adobe.com/devnet/livecycle/articles/designer_coldfusion.html