Hi NC1787,
Sorry for the delay in responding to your post.
Qdabra offers InfoPath-SQL hosting - see FormsBoard dot com for details.
Qdabra also offers a Web service that will store your XML as a blob in SQL (in addition to mapping it out to your database for reporting and downstream, line-of-business consumers). Since it stores it as an XML blob, it supports 100% fidelity for rich XML content - large fields, images, rich text, etc. The trial is free and the cost is low (and based on server not client access). It's easy to get it up and running, but you'll want to recreate your form using an XML schema and not a schema derived from the Access Database (which will intrinsically limit you).