Thinktecture's Christian Weyer and Buddhike de Silva have released the latest version of this excellent toolkit. Now for .Net 2.0 and VS2005 only, in my mind this really is the optimum way of defining and coding web services across corporate boundaries.
The Web Services Contract First methodology is really a return to the original spirit of web services - that of an interface driven service oriented architecture. By providing all the tools to let you generate the WSDL contact first, this toolset makes you think about the interface between services, rather than the traditional VS driven way of just exposing your existing classes through a webservice.
I blogged about this before after going to a presentation on this by Christian, and am still as impressed - I just can't believe I missed the 0.6 release until now!
More information and the download links can be found at http://www.thinktecture.com/Resources/Software/WSContractFirst/default.html.