Getting user information in an InfoPath Form

I was building a demonstration form in InfoPath last week, and it occured to me that if I wanted to get more info than just the user name, how would I go about that?

This article explains how to use the UserProfileService of MOSS 2007;

http://blogs.msdn.com/infopath/archive/2007/03/07/get-the-user-profile-through-moss-web-services.aspx