The booty
You could buy lots and lots of W&M stuff in the leadup to the wedding.
Update: You can buy a 420mm x 594 mm poster of The Kiss/De Kus.
In rough order of disturbingness...
A jigsaw puzzle. Yeah, sure, that's cute.(€11,34 from Bart Smit)
A close-up jigsaw puzzle. I bet you could draw Willem-Alexander's wrinkles in your sleep after finishing this. (€11,34 from Bart Smit).
Glasses and mugs with a picture of the soon-to-be royal couple. Perfectly normal so far. (Cups €3,61 from Blokker, glasses €1,99).
Photo frames. Still fairly normal. Lots of photo frames have pictures of other people's weddings in them, they're just not usually real couples. You're really buying this for the crown on top of the frame so you can put a picture of your fat drooling baby in it, so it's not really like you're going to put photos of perfect strangers on your mantlepiece.
Fake tattoes to wear on the day. You could probably wear these on Queen's Day, too, so it's not such a bad buy. Otoh, Fraser's 'Maxima [heart]'s Alex' fake tatts don't have such a long life.
A calendar, so Willem and Maxima can be in your life all year around. (€6,78 from Blokker).
The cd of music from the wedding. The cd is set to be number 1 on the Dutch Top 100 by this weekend. (€14,99) [Free Record Shop link]
Official video or dvd of the wedding.
Special covers for your tape of the wedding off tv. (Have you ever noticed that Willem-Alexander is doing a lot for the comeback of 80s hair?)
Maxima video, for boning up on essential trivia. Or stalking. Whichever you prefer. (€8,99 from Bart Smit).
Serviettes. I'm not sure it's normal to wipe your face on anyone else's, especially when it's their wedding day. (€1,99 from Blokker).
(Limited edition) Maxima undies. These had a tiny little crown, I also saw some with a tiny little key. (€6.95).
It's not the image quality, the doll really was this ugly. (€4.54).
This is just not normal. (€13,59 from Blokker).
Confession: things we actually own inlude two different kinds of W&M serviettes (one brought over by Caroline); crown-shaped candle holders (my fault); the first W&M dvd (Fraser's fault); a jewellry set - tiara, necklace, etc (my fault); the tatts mentioned above (Fraser), orange balloons, lots of orange snacks including special W&M all-orange pack of M&M's.
More merchandise: Official Merchandise || Expatica.com article on Maxima merchandise.
The websites
Expatica overview || http://www.tref.nl/maxima/ || http://maxima.pagina.nl/ || http://www.start2000.nl/adel.htm || http://home.student.utwente.nl/j.r.nieuwenweg/maxima/ || http://www.maxima-zorreguieta.net/ http://www.alex-maxima.nl/ (leads to a used car site - classy, eh?)