All I could find:

Jam! Movies reports:
“Almost Famous” star Billy Crudup is the latest actor to join the cast of Tom Cruise’s “Mission: Impossible 3,” Variety reports. Details of Crudup’s role in the sequel have not yet been revealed. Mission: Impossible 3,” also features Ving Rhames, Michelle Monaghan, Jonathan Rhys-Meyers and Philip Seymour Huffman. Director J.J. Abrams began shooting the film in Caserta, Italy on July 18. It is scheduled to be released worldwide on May 2.

Dexigner.com says:
Katie Holmes, whose sleek feminine style has been recently gracing fashion magazines covers, may put her fashion sense to work and design the wedding dress of her dreams.
Although the date and the style of Tom Cruise and Katie Holmes’ wedding have not been revealed, Katie Holmes is already browsing through fashion magazines in search for the inspiration for that perfect wedding dress.
Tom Cruise’s representative Lee Anne Devette confirmed that Katie has not chosen her dress yet and is now figuring out what she wants to do. Katie may even design her own wedding dress. “She has incredible style,” Lee Anne Devette added.

And CanMag.com also tells us the new M:I-3 website is online, we already knew that.