The last few tweaks for 0.7.5 are being made, and it may well be out before this sale ends!
And remember, with the release of the update, the price will take another small step towards the final full price, whatever that will be, so grab Kobo Redux now, and save a massive... $1.70, or so.
As a bonus for getting in early, you get a chance to try it right away (obviously), and most importantly, tell me how broken it is, before it's too late to fix it! :-)