The UN has some terrific multimedia resources up on new SG Ban Ki-moon.
You can watch a video of Ban’s address to the General Assembly (audio and text also available), which he gave after taking the oath of office. There’s also video coverage of the press conference and swearing-in ceremony available.
If you’d rather listen than watch, you can also check out UN Radio’s report on the appointment or this segment from NPR.
For more info on Ban Ki-moon’s career and accomplishments, click here.