Perhaps the most highly-anticipated double-opening in Chicago's culinary history has split in two.

Grant Achatz's Next and Aviary, originally scheduled to open in tandem, have been delayed yet again, and will now open separately, according to a Tweet sent by @GAchatz this afternoon: "We R excited & nervous about openings. Everything thus far points 2 4/6 opening 4 Next. Aviary will delay slightly. We want 2 make it great."

No telling yet whether that "slight" delay for Aviary means days or weeks, but we'll keep you all posted as we receive details.

Update: Our colleague Lisa Arnett of Metromix has details on how to buy tickets for dinner at Next.