The Developer and Platform Evangelism group here at Microsoft, the org in which I work, is responsible for staging PDC and MIX.
MIX is an annual event for designers, developers and business decision makers (BDMs in Microsoft speak) and from April 30th to May 2nd the second annual version, MIX07, will light up the Venetian hotel in Las Vegas.
Registration for MIX07 is open and you don't want to miss it!.
Leading up to both PDC and MIX I do a series of short telephone podcast interviews with the speakers and staff who are putting on the event. For my first show for MIX07 I spoke with Brad Abrams regarding ASP.Net AJAX how it has grown since last year's beta release code-named "Atlas".