The hubby made a batch of these for a party we're got this afternoon. They should make a big splash; the hosting couple have their own regulation-size beer pong table, so it's going to be one of those kinds of parties. And frankly, it's about time.
Important safety tip: Cut the jelly slab into 1"/2.54 cm squares, no matter what the devil on your shoulder urges. The shots are potent. I used Mandarin orange segments and maraschino cherries, cut into fourths, for the garnish. Mine do not look nearly as nice as the photo here, which is from the linked article.