They've apparently got data beyond red-shifts of 1.5:



There seems to be something to the thought that the cosmological constant is slightly positive (implying some acceleration), but they're looking at very, very faint objects and applying lots of assumptions. There's a lot of scatter in the data too...

I dunno.

The universe is an amazingly rich, complex, and wonderful place. We shouldn't have so much hubris to think that we've got it all figured out in just the 90 years since the Big Bang was seriously considered in the scientific literature.

Fascinating stuff.

Cheers,
Scott.