What is the best way to submit my browser based infoPath form to a web
service?  I currently am submitting based on mySchema.xsd, and my web
service generates a proxy class based on this so it understands what it is
getting, however I am also considering using a data set (typed or untyped
preference?).

Also, I need a unique key back from the database via my webservice so I can
store it in my form - how is this typically done?  I am storing the xml
document in sharepoint and in a backend database via a web service.

Thanks

Clayton