Last Friday (Feb 02 2007) Microsoft help a scheduled webcast that talked about the impending DST changes and how they affect appointments and calendars in Outlook and Exchange. Unfortunately, the demand for this webcast far exceeded the capacity and it was quickly full. If you, like me, weren't able to get into the webcast, you can now view it online.
They've thoughtfully provided both streaming and offline options -- I'm downloading the presentation right now, and it's not that large (3.42MB). You can also get audio-only streams in both .WMA and .MP3 formats, and the PowerPoint presentation deck as well.