From a Romney press release:

The speech will take place at 10:30am Eastern at the George Bush Presidential Library in College Station, Texas. You may watch the entire speech live on MittRomney.com.

NANCY ADDS:
I'm here in College Station and just saw some calm and collected Romney folks in the lobby. Anyway, I realized TiVo isn't available twelve miles from Iran. If any of you can record the speech and burn it on a DVD, I bet David would love to see it. (I could e-mail you his shipping address.)

Thanks!

ALSO: If you want to listen to it via phone, here's the info:

Phone Number For Listen-Only Program Feed: 866-866-2244
Participant Code: 9411758