Even if the site still is not updated, the Microsoft BI Conference 2010 will be joined with TechEd 2010 in New Orleans, LA. The conference will start on June 7, 2010, with a pre-conference day on June 6 (there are still no updates about BI Conference on the TechEd site too).
I think this is a good way to optimize content delivery. Several (technical) sessions can really be shared across TechEd and BI Conference, and there is the opportunity to add sessions less technical and more business-oriented that wouldn’t have fit very well at TechEd.