WSCF: Making Contract First ASMX Web Services Really Work
Christian Weyer's company thinktecture is offering the WSCF toolkit to make practical XSD-driven contract first web service programming.
Benjamin Mitchell has a great description of the tool. More here by Simon Guest.
Mention is also given here by Arron Skonnard.
The object generation portion of WSCF competes with the xsd.exe and XSDObjectGen tools.