IBM Developerworks has a nice clean looking site for SOA best practices, pulling in various content from all over the place. It’s worth checking out.
It led me to an interesting link, Top 10 SOA and Web services tutorials and articles. Its interesting to see what the most popular tutorials and articles are on developerworks. They’re pretty basic but #1 does include my favorite link to ‘Which Style of WSDL should I use?.