Is there a link so we can listen to it?
Here's audio to the speech.
http://www.mymanmitt.com/2007/01/from-israel-mitt-plan-for-iran.asp
You can find bits of video on his exploratory committee website under MittTv. www.mittromney.com
"Is there a link so we can listen to it?"
I could only find this video of the last minutes of the speech:
http://mittromney.permissiontv.com/ptvweb_loader.swf?home_page=embedBlog&showid=38209
The most complete group of video segments of the Romney speech at the Herzliya, Israel conference I've found so far is here. I haven't found video of the speech from beginning to end on the web, but there is an audio recording of the entire speech (MP3 format).