When you call MS and are put on hold, the canned wait music includes an announcement that later this spring the DVC website will offer the ability to book shorter II stays. No details, however.
I've been very curious, too! I wonder how many properties that they will offer the 3-4 days option? I'm hoping there will be at least several in California for nice long weekend trips!
And I am hoping for New England/Vermont area for long summer weekends.....I'd love to get into Cape Cod or Martha's Vineyard or Nantucket or Boston, etc, etc