The text of Senator Obama’s speech can be found on the web at Senator Obama’s website at http://my.barackobama.com/page/content/hisownwords.
The text of Senator McCain’s speech can be found on the web at the New York Times site at http://www.nytimes.com/2008/03/26/us/politics/26text-mccain.html.
Unfortunately, I have yet to find any speech by Senator Clinton that approaches the standards of forthrightness and clarity of position demonstrated in these two speeches.