No it hasn’t as of today. The area (formerly Swensens) is still boxed up.
Walking over to its original location at Novena Ville (across Novena Church), I found that the stall there was still open. It’s last day is on 7 April, after which it will move to its new location at United Square.
Update (9 April 2013): Many thanks to a reader of the blog who posted in the comments below. Apparently the outlet at United Square is still under renovations, but Wee Nam Kee Novena is taking orders for takeaway, even if their Novena Ville outlet is closed.