Using InfoScope, you can use your web service more easily This form uses Web Service as secondary data source and submit input data to Web Service. To Submit your input data to Web Service, use ContextMenu.
SP1-Lab8 Sample
<Description> InfoPath Sp1's Sample : http://msdn.microsoft.com/library/en-us/odc_ip2003_tr/html/odc_INF_Lab_08.asp?frame=true