I've written yet another Scripture search tool. Now you can search the Lectionary by Scripture reference. If you want to know when we hear John 1:1-14 at Mass, now you can find out easily! Edit: As of noon on January 28, I've included the Lessons, Epistles, and Gospels of the Extraordinary Form of the Mass. I don't yet have the Graduals, Alleluias, and Tracts from the 1962 Missal, nor the propers for votive Masses.
This tool, like the Catechism and Magisterial Documents tools, is free to use. Please advertise it on your web site or blog if you find it handy!