SLS
is due to open later this year. It was scheduled for spring but has been pushed back, I believe to fall 2014. From the outside, it looks to be nearly done.
The project has been similar to the Downtown Grand (former Lady Luck) which opened late last year and the recently opened Cromwell (formerly Bill's gambling hall and Barbary coast before that), in that rather than completely knock down the old building and start from scratch, these properties where stripped down to the steel skeletons and rebuilt on the same foot print.