Below are the latest and the new features in Infopath developer
(1)New Way to Write and EDIT Code
(2)SharePoint Sandboxed Solutions
(3)Publish Forms with ONE Click
(4)Enhance SharePoint List Forms
(5)HOST Forms on Portal Pages USING the InfoPath FORM Web Part
(6)Richer Web Forms
(7)Standards Compliant Browser Forms
(8)Provide Enhanced Information Security and Integrity with Digital Signatures
(9)New Controls