Bryan Doughty, one of the folks running Cimarron Music (who publish my music), has just done an arrangement of Arrival of the Queen of Sheba for either tuba or euphonium and piano. He is offering it for free at the following site:

http://www.lowbrassmusic.com/queen-of-sheba

And he posted a video of the tuba version if you would like to get an idea how it sounds:

http://www.youtube.com/watch?v=K8dAikPNrn8