Through a highly academic survey of this article on Wikipedia, I have determined that the shofar was once used for all of the following (the following list does not include the obvious military applications of shofarim a la Sefer Yehoshuah) :
-Causing folks to tremble, by blowing the shofar from the midst of a cloud of smoke from atop Har Sinai
-Announcing the commencement of Rosh Chodesh
-Announcing the commencement of “solemn feasts”
-Announcing the commencement of a jubilee year
-Rosh Hashanah and Yom Kipur (welcome to the “no, duh” bullet of the list)
-Ceremonies, such as processions
-In an accompanying orchestra to a psalm of praise
-Announcing the commencement of Shabat
-Marking the moment of reunification of East and West Jerusalem in 1967
And so I ask you, gentle readers, WTF? What happened? Where did it go? Why have we restricted the use of perhaps the most primal and arousing of our ritual objects to two days a year?
Frankly, I think we ought to use them more often. And not in the sanctuary. I think we ought to use them in a muezzin-like fashion, outside calling out for all, Jew and non-Jew, to hear.