Some of Bonnie Hunters quilts use the Tri-recs...look in the free patterns on the left side of her site and/or the recent mystery she did last fall: Celtic Solstice. If you like the CS, hurry and print it out, I think she said she was taking it down June 1st to put in her next book.
www.quiltville.com
Also Judy Laquidara uses the Tri Recs frequently. She has some free patterns on her site as well....
www.patchworktimes.com (try saying that last name 3 times fast! I can't! lol...love that girl)