Michael Dubruiel has the full text of Pope Benedict's homily for today's Feast, as well as a cool audio meditation. Check it out. And his blog is titled "Annunciations of a New Springtime." So, in a way, it's his Blog Feast Day! :-)
Angelus Domini nuntiavit Mariae.
Et concepit de Spiritu Sancto.
Ecce ancilla Domini,
Fiat mihi secundum verbum tuum.
Et verbum caro factum est,
Et habitavit in nobis.
Ora pro nobis, sancta Dei Genitrix,
Ut digni efficiamur promissionibus Christi.