This weekend I took some time to research and then test methods to post information from an Infopath form to a SharePoint List. My thoughts are to take advantage of the Forms Services capabilities in the Enterprise Edition of MOSS to provide a nice looking presentation in place of the typical add item offered by out of the box SharePoint. I was happy (and lucky) to live.com search two very good examples on how to do this, and wanted to share my findings.
Some key things I learned during this exercise:
This is a good starter example. The nice thing about the example below is that it can be published to your site without admin approval (it requires no custom code). The down side is the form is pretty rough on the eyes.
http://blogs.msdn.com/infopath/archive/2007/03/26/submitting-to-a-sharepoint-list.aspx
The example below required .Net support to be installed for Infopath to complete. This form will require admin approval and upload, but on the plus side you can format your form to looks as nice as you like.
http://enterprise-solutions.swits.net/infopath2007/article.php?t=programmatically-add-item-sharepoint-calendar-infopath&c=infopath2007
Below is a forum for discussion infopath and SharePoint issues.
http://forums.microsoft.com/MSDN/ShowForum.aspx?ForumID=1206&SiteID=1
Enjoy!