If it was such a big deal to offer the fourth cup, it should have been scheduled for last year. It was as simple as putting it on a calendar. Otherwise the response to issuing last year's cup now should have been, "That's all well and good, but it's 2004 and I think we have to assume people know that."
M2 - they don't advertise in the calendar because they are available during the all the games - you can ask for a collector cup or not (the collector cups are usually larger and more expensive). I wasn't aware that there were different cups each year.
Right now I'm looking at the 3 cups that I have - 1 from last year (that says Collector Series #1 or 4 and another with Austin Kearns (2 of those and from 2002) that says Collector Series #5 or 5. What's so funny is that I've never notice the #'s before. I usually get them at the end of the game (along with lots of other fans) and wash them out, then soak them in dishwashing liquid overnight. And that's only if I like them...