For information on the history and significance of the Exaltation of the Holy Cross, Fisheaters has a wonderful article on it:
UPDATE: The televised TLM on EWTN was absolutely beautiful, but experienced technical difficulties from just after the consecration of the bread to about the people's communion. Bad time to have such difficulties, given the importance of this broadcast, but other than that it was fine.
The homily was superb, very comprehensive; He highlighted the importance of the Extraordinary Form, the Importance of the Exaltation of the Cross, and above all the importance of today's gospel, and a focus on actual participation means, and the importance of latin; Each topic intertwining with the next.
I'll be sure to post it here if EWTN puts it in their archive.