Alas, May 1st came and passed without incident, but now the exact same models mentioned by Nintendo Only have appeared in the database of a German retailer ("hellblau" is "light blue," while the others are obvious), complete with listings for red, green, and turquoise (?) styli. Oh, and there also appears to be serial numbers -- serial numbers make everything look more official.
Suddenly, this same speculation is looking far more credible, and we're way too excited again. Skip past the break for the full listings.