Some interesting things came out of yesterday's sessions, particularly around Office 2007 and other 2k7 releases:
.NET 3.0 (formerly WinFX) is the amalgamation of .NET 2.0, Windows Communication Foundation (Formerly Indigo), Windows Workflow Foundation (WF), Windows Presentation Foundation (formerly Avalon), Windows Cardspace.
A new tool called Office Sharepoint Designer allows the information worker to design workflow that will be 'run' on the WF (apparently pronounced dub-eff). Instead of a visual tool like the orchestration designer, this will be based on the Office Rules Wizard allowing the IW to determine the workflow using a set of rules.
Useful links for SOA:
The Architecture Journal
HP is doing some great benchmarking and performance analysis of BizTalk Server 2006 as well as creating reference architectures to help answer customer questions like "how well does BizTalk perform?". They have sizers as well, for determining what architecture/license structure will be necessary given a set of usage/volume requirements. As yet, they do not provide one for BizTalk, but it will come soon.