And no, not the Village People sort, because funnily enough, that's what came to mind when I typed that headline down. You know, the "we want you!" sort.
But yes, the folks behind Lost are really looking for a theme tune. Oh, but they're not really going to use it in the show's final episodes--for that, the eerie opening titles with floating white text on a black background still works best. But lots of fans like you have done this sort of YouTube, right? Stitch scenes together, throw in some music, upload, discuss.