Fr. Hinnebusch (1917-2002), a friar of the Central and Southern U.S. Dominican Provinces*, wrote 18 books, 131 articles, and who knows how many homilies. The website presents a wide variety of his work -- some in audio (MP3), others as text (.doc).
A particularly nice feature of the website is the calendar, which presents the archived material according to the liturgical calendar. For example, if you want to know what he might have preached for today, Wednesday of the 27th Week in Ordinary Time, Year 1, try this.
*: As noted by Fr. Powell, Fr. Hinnebusch was a son of the Central Province and a founding father of the Southern Province, which was officially formed in 1980.