... Sadly, I didn't make a market for this.

The fork is scheduled for block 4230000, which (by some rough calculations) will land in 3-5 hours (assuming 11-second and 15-second average block time, respectively). That's around 15:00 UTC, /- 1 hour.

The highest perceived impact, I think, will be EIP-1283, "Net gas metering for SSTORE".

One criticism of Augur I've seen a lot is "transactions being very expensive", with cited prices referencing the maximum gas allowance (millions of gas in many cases), as estimated during transaction signing. This is slightly misleading: after the transactions get confirmed, the end-of-execution consumption is often around 30-50%% of the maximum.

If I had to guess, the maximum is so high due to Augur's contracts setting (to non-0) and re-setting (to 0) values in storage (e.g. for the nonReentrant mutex); there's no other mechanism I can think of that requires the maximum allowance to be high, but the post-transaction bill to be low, with such great a disparity.

If someone's got an augur-app synced to Ropsten, it'd be nice to see a comparison before the fork and after.

EDIT: Oh, look. It takes 2 minutes to sync; guess I'll try this myself.