The belated trophy for best photo-related April Fool's gag has to go to the RE-35. A digital cartridge for film cameras? It's so brilliantly silly that it's almost believable.
I guess a lot of others thought so too. The product site became so popular that this morning it collapsed under its own weight and was replaced with a general site marker. Oh well, fun while it lasted. Some tearpages can still be found here.