The Biblia Hebraica Quinta (BHQ) will supercede the current scholarly edition of the Hebrew Bible, the Biblia Hebraica Stuttgartensia (BHS).
I reviewed the BHS module in Accordance Bible Software here, and posted at length about the BHQ here, if you want a primer. Short version: Emanuel Tov says it is “much richer in data, more mature, judicious and cautious than its predecessors. It heralds a very important step forward in the BH series,” though he notes that its notations are “more complex” and “less user-friendly for the non-expert.”
Here is BHQ on Amazon; here it is at Hendrickson Publishers’ site.
Hendrickson sent out an update today with the BHQ publishing schedule as it currently stands. Most volumes are “in preparation,” but the schedule (available here) notes that Ezekiel (ed. by Johan Lust) is coming in 2016 and Numbers (ed. by Martin Rösel) is coming in 2017.
Words on the Word 
Wasn’t the initial projection for 2010?
Ha. Yes. Then 2015, then….
I can only imagine how long a project like this takes. But I do take all projections with a grain of salt.
I thought it was 2005! Do either of you know if they still plan, once it’s finished, to print the text and apparatus in one volume (à la BHS) and the notes and commentary in another (or others)?
I don’t know. Was that announced at some point?