Jennifer - I keep forgetting to respond to your question from last night.
One of the bloggers on AllEars had posted in December about a t-shirt he bought that had the monorail (and the DL castle

) on it with the "por favor...." spiel on it. He then posted shortly thereafter that the shirt was no longer available, and he was sorry to get everyone's hopes up.
http://www.allearsnet.com/blogs/jackspence/2007/12/por_favor.html
http://www.allearsnet.com/blogs/jackspence/2008/01/purchasing_the_monorail_tshirt.html
http://www.allearsnet.com/blogs/jackspence/2008/01/tshirt_1.html
But - apparently they're just on backorder, as someone sent the info. in to the AllEars newsletter this week with all the pertinent ordering info. I called WDW Merchandise Mail-Order this week, and they knew exactly what I was talking about. They had expected the new shipment in by February, but assured me I would get a shirt sent out when they finally came in.
Needless to say, Jonathan was thrilled with that little gift. One of his favorite things to do is repeat that phrase.
Here's the blurb from this week's AllEars newsletter:
... from Dana: My tip is about the the grey (Spanish/English) Monorail t-shirt that was available in December. I just wanted to let you and your readers know that I've contacted Disney Merchandise and placed an order for the shirt. The cast member told me that it would be available anytime between now and February, but an order could be placed now. They just asked for the SKU number and credit card information. The credit card will not be charged until the order is fulfilled. Here is the information emailed directly from the Disney Merchandise Department:
Por Favor Tee, Adult, Grey, $21.95
Sku 175-07390 (small) through 175-07394 (2XL)
Shipping and Handling for this item only: $9.95
I hope this helps those who are interested. Thanks again for mentioning this shirt. I never knew it existed before reading the newsletter!