I've been following this thread ever since I applied for my Nexus pass. This morning I received Conditional approval. Just wanted to share my timeline for those who are waiting to hear back
Online application submitted: December 2
Conditional approval: December 13
Interview scheduled: July 16, 2015 in SEA. Checked back 10 mins later and got June 1, 2015.
Edit: Kept checking the past few days and eventually scored interviews for March 10 for myself, and April 1 for my fiancee (SEA center). Will continue to keep checking for cancellations.