Tsk, tsk, Cuccoscratch. Miyamoto talks about Zelda in his conference and there's no thread about it?
You may read the article here:
http://wii.ign.com/articles/990/990149p1.htmlBut that "more mature than ever before" thing appears to be at least partially bullshit, as the game looks to be following the Twilight Princess visual style:

Image comes from here:
http://www.nintendoworldreport.com/newsArt.cfm?artid=18699Let the speculation commence!
Edit: forgot to mention that he said that he wanted to show the game off this year, but they saved E3 for Mario stuff/the game wasn't quite ready. It should be released next year (we'll probably get some info at Nintendo's October event), but there's a chance it will be pushed back to 2011.*
*
Which basically means it will release in 2011. Because this is Zelda we're talking about here. Iri am cry. 