From Brick U by the Great Yak:
A danish interview with Vilstrup regarding the closure. Paste the latter URL into google translate, it's mostly readable.
http://translate.google.com/http://www.comon.dk/art/204629?a=rss&i=0The comments section does not translate.
(note the Dilbert comic in Danish at the bottom...)
Anyways, sounds like the "digital" strategy is now, "anything developed and hosted in-house should concern itself only with current product lines," otherwise it will be along the Traveller's Tales/WB Games licensing to a partner company, where Lego gets it's licensing fees and retains control of the IP, and the partner companies are in charge of distribution and marketing for that property.
Sadly, he doesn't mention if they even explored selling it off to another company (one with MMOG management experience). The only real IP in it that was not developed strictly for LU was the Ninjago content, which could certainly have been excised if they were developing/licensing other IP (computer games with an exclusive license for the licensee) with that theme.