You might have seen some talk of the Commonwealth Bank of Australia (CBA) CommSee project. Its a highly successful SOA implementation with many interesting aspects (incremental delivery approach, Service design, .NET Smart client, large scale project, mainframe integration, user centric etc etc).

It's been featured in quite a few articles such as CIO Insight and of course my colleagues Nigel and Anna blogged about the User experience side of CommSee.

Now there is an MSDN page dedicated to CommSee where you can find a series of video interviews with the CommSee team discussing the operational and architecture aspects of the CommSee project as well as some case studies. 

Some great stuff here on SOA in the real world.