Saw a very interesting article on InfoQ by Ben Wilcock where he described a dead simple SOA R&R using a very pragmatic approach with Maven combined with a simple HTML app.
http://www.infoq.com/articles/SimpleServiceRepository
As an integration consultant I've worked with registries ranging from overly complex offerings (IBM Websphere Registry and Repository) to time-consuming simple wikis, but I have to say that his solution is arguably the most elegant yet.
The best part is that you both get the visibility as your schemas and contracts are available to all your stakeholders, while keeping your co-developers happy by just pointing them to a Maven project to include in their dependencies.
I'm definately hijacking this concept to my current project, and I find it very interesting that this solution has been under my nose all this time without reflecting on it.
