KLM Flying Dutchman - KLM World Trips

I've just noticed that KLM has a new section on their website, called "World Trips", where they have a number of selected multi-stop itineraries available at a special price.

http://www.klm.com/travel/nl_en/plan_and_book/travelinspiration/wereldreis/index.htm

€815 Amsterdam-New York-Miami-Amsterdam
€940 Amsterdam-New York-Los Angeles-Amsterdam
€990 Amsterdam-New York-San Francisco-Amsterdam
€1010 Amsterdam-Denpasar Bali-Singapore-Amsterdam
€1125 Amsterdam-Kuala Lumpur-Jakarta-Amsterdam
€1200 Amsterdam-Mexico City-Los Angeles-Amsterdam
€1260 Amsterdam-Perth-Singapore-Amsterdam
€1260 Amsterdam-Kuala Lumpur-Sydney-Amsterdam
€1330 Amsterdam-Kuala Lumpur-Sydney-Hong Kong-Amsterdam
€1365 Amsterdam-Kuala Lumpur-Auckland-Amsterdam
€1370 Amsterdam-Kuala Lumpur-Melbourne-Hong Kong-Amsterdam
€2050 Amsterdam-Lima-Panama-Atlanta-Amsterdam

That is a kind of cool concept. Are there any stay requirements at each stop? (Ie min 3 days or a sunday, max 1 month)?

From playing around with the calendar of available dates for AMS-PER-SIN-AMS it appears that a stopover has to be for at least 2 nights [though actually, given that when flying East you arrive on the day after departure, this in effect means a 1-night stay for some sectors], but there appears to be no maximum stay (calendar illustrates dates up to 31.12.2012 and "yellow" dates show up no matter how long you make any single stopover.

Note also that, although the calendar tool won't go past 31.12.2012, the same fares can be booked for dates going into 2013 if you select dates via the "normal" booking tools.