The best tribute to Ted Kennedy I have read is this one from Michael Tomasky in the Guardian, entitled, simply, "Ted Kennedy made the US a better place":
There are and will be more Kennedys, but the Kennedy era is over now. Teddy was imperfect enough that some Americans will say amen to that. Let them. The rest of us know what a dramatically better place this country is because of him.
The Boston Globe has an excellent series of videos on You Tube which relate Ted Kennedy's life story. The series includes this video about the 1980 CBS interview with Roger Mudd, when Ted Kennedy had trouble answering the simple question: "Why do you want to be President?" It is perhaps an object lesson in how to get the truth out with a simple question:
Here also is the text of Kennedy's superb speech from the 1980 Democratic convention (thanks to Tony Ferguson for the link). You can hear the speech in two parts here , here, here and here. It is covered in a Boston Globe video here: