My new project, being a service-bus design that makes maximum use of messaging and minimum use of orchestration, requires me to design a lot of custom pipelines and pipeline components. I have noticed that on Codeplex there is a new version of the pipeline component wizard that is updated for BizTalk 2009 (presumably this is just the versions of the referenced assemblies as the interfaces look pretty much the same). You can find it here:
If you're interested in BizTalk but have not created your own pipelines yet, then please do go through the SDK to see how they're built. There is a huge amount of power in there that is just waiting to be unleashed!
Also, because the messaging features of BizTalk (i.e. send + reveive ports) use the application bindings to link the components together they are far more flexible for installing updated versions than orchestrations, which have subscriptions that need to be managed in an upgrade scenario.