I came across a nice article on Office Online that explains the controls and features available in InfoPath 2007 that are not available in InfoPath Forms Service. It may be helpful when making design decisions for a form that needs to be Forms Service compatible.
InfoPath 2007 features that are unavailable in InfoPath Forms Services
About Hilary Stoupa
I wandered into development after working as a business process analyst for a global manufacturing company. I create InfoPath solutions for our clients as well as work as a developer on company tools that extend InfoPath. I've also been instrumental in creating the InfoPath Master Class training provided by Qdabra.