I recently participated to a great experience!!! Writing a book with 12 co-authors using Sharepoint. I wrote two chapters about the development with Visual Studio .NET 2003 for Sharepoint and one part of a chapter about the integration of Groove and Sharepoint. This book is now available, here.
I started to look at Infopath long time ago and was waiting for that solution. I was really surprised to see Infopath with something else then .NET to wrtie code for it. That's over. :-)
Since I implemented a tool to write the article on my web site Tech Head Brothers based on Word 2003 and Visual Studio Toolkit I was waiting the toolkit for Infopath to be able to have a form to post News that will use WSE to handle secured connection to my site.<br/>In this new version when you add a button you will get a dialog with a button "Edit from code" and when you click on it your get back to Visual Studio that already added a handler for you:
If you want to understand the different security aspect in Web Services I recommend you this new cool MSDN Article: How to use Web Services Enhancements 2.0 to implement security, trust, and secure conversations in Web services architecture.