In an article by The Daily Mail, director Rob Ashford is quoted that he is currently preparing Daniel Radcliffe for his next Broadway project, How to Succeed in Business Without Really Trying. Daniel is also undergoing voice lessons as as well dance lessons to prepare for his role.

He’s singing every day with a vocal coach in London and I’ve got my assistant putting him through his dance paces every other day. I’m covering all bases with Daniel – and he’s delivering,’ Ashford told me.

Castmate Rose Hemingway, who was cast to play Daniel’s stage girlfriend Rosemary Pilkington, has praise for her Potter co-star.
He’s been doing a lot of work and he’s going to surprise people. He’s not afraid to learn how to do things,’ the 26-year-old actress from Philadelphia said.

It's official confirmed: Daniel wil be on Broadway again next spring in the musical How to Succeed in Business Without Really Trying. He will be dancing and singing. When we know more, you will hear it here.

Radcliffe will portray the show's unlikely hero, an opportunistic young man who rises from the mail room to the top of the corporate heap in this satiric, Pulitzer Prize-winning musical. It features a score by Frank Loesser and a book by Abe Burrows, Jack Weinstock and Willie Gilbert.

The show's producers said Thursday the musical will be directed and choreographed by Rob Ashford.

Another Universal Orlando's The Wizarding World of Harry Potter, Florida video with cast members including Daniel.

In a new interview from the set of Deathly Hallows, Daniel spoke about the difficult task of shooting the Seven Harrys sequence, in which he had to transform into Ron, Hermione, Fleur, Fred, George, and Mundungus Fletcher, as well as himself as Harry.

Update: 19th April 2011. Video via Warner Bros. A look behind the scenes
Quote:

For Radcliffe, it was more difficult than he expected. "First, we filmed the scene with them all. I watched and did my best to imitate them," he said. Dan also joked about having to dress up as the two female characters who transform into Harry, Hermione and Fleur.

Quote:

Target of play behind the scenes of "Deathly Hallows", he defends the "accusations" that he wore girls' costumes on camera - more specifically, Fleur's (Clemence Poesy) clothes. "It wasn't a dress, it was just a coat and a bra."

Telegraph has posted an interview with Stephen Merchant, the creative partner from Ricky Gervais (co-actor from Dan in Extras, 2006) And Dan was also mentioned:

Daniel Radcliffe remembers watching this dynamic at work when the Harry Potter star filmed his episode of Extras. 'Ricky is obviously much more of a showman,’ says Radcliffe. 'But you almost get the sense that he wouldn’t be able to do that without Stephen.'