Drats! I dragged this module out of it's coma (from 2001!) a few weeks ago to fix a bug with ")" and "(" in morse, only to forget about "@" :-(
About International Morse Code: Quite a few people obviously use their own encoding for their characters, like the Japanese, or the German Umlaute. (Convert Morse also does contain more than the regular characters). This dilemma could be solved with a "strict" mode.
Maybe the module should finally be made OO.
Btw: The link to the "@" is dead.