What In The World Are They Building at 3809 Mockingbird?

Recall when I first saw this very interesting home going up over on Mockingbird a few months ago? Owned by a Lim Lin of Murphy, Texas. Today Merritt Patterson had something up about it in the Park Cities People Blog, and what concerns me is there doesn’t seem to be a lot of progress made since March 10. (See Merritt’s photo below mine.) So what gives?