I've actually had Wii Party U pre ordered with Newegg for weeks at that $39.99 price. I posted about it when I found it, thought that listing is probably buried by now. They also had Wii Fit U for $40 back in August- I should have jumped on it then. Oh well, probably end up getting the balance board bundle anyways for $89.99 when the game releases in December, although I'll definitely scoop the free trial download of the game being offered this November, and sync the Fit Meter to keep the download forever for free, that way I can access it at any time without switching discs, and still have a physical copy for my collection of Wii U titles.
I pre ordered DKC Tropical Freeze with Newegg using an $8 off promo code a month or so ago, but the MSRP was $59.99. After it was announced the game would retail for only $49.99, I cancelled my pre order and went with Amazon, since their price reflects the new MSRP. I wonder, if I had kept my pre order with Newegg, would they have still honored the $8 promo whenever they get around to updating the price...?