So apparently, a plain sword wasn't good enough for this guy ... wonder who recognized the blade as a batleth ...
http://www.gazette.com/articles/store_47426___article.html/colorado_sword.html
Poor Worf, times are tough even for Klingons. :'(
My apologies, after bein reprimanded by online readers, I now know that it is Bat'leth ... although whether it counts as a sword is still being debated.
For future reference, I will check the Wikipedia list of Star Trek weaponry.