Yesterday, I delivered my third webcast in the Ascend program. This one was dedicated to working with Excel Services, the integration of SQL Server Reporting Services, the Report Center and the infrastructure provided with MOSS 2007 for doing BI in the portal. Compared to the WCM webcast this one went very smooth. I had a lot of network problems during the WCM cast - but I have done a decent recording on Wednesday that will be available.
There was a question on the future of Office Web Components (OWC) in the new SharePoint. The story is that you will be able to use the OWCs without a problem in the next version but there is likely not going to be a follow-up version. Microsoft wants you to invest in Excel Services (the Web access for spreadsheets or snapshots, and the Web Service).
In addition to the material covered, here are some useful links to resources if you want to learn more on Excel Services: