The eShop will be having a sale, with the following titles available for cheap. Some of these (Soul Hackers, Etrian Odyssey, Shadow Wars) are among the best the system has to offer so if you haven't picked them up already, now would be a great time:
Shin Megami Tensei: Devil Summoner: Soul Hacker $30 (down from $40)
Etrian Odyssey IV: Legends of the Titan $30 (down from $40)
Code of Princess $20 (down from $30)
Rayman Origins $21 (down from $30)
Rabbids Travel in Time 3D $21 (down from $30)
Petz Fantasy 3D $21 (down from $30)
Rayman 3D $21 (down from $30)
Tom Clancy's Splinter Cell 3D $21 (down from $30)
Tom Clancy's Ghost Recon: Shadow Wars $21 (down from $30)
I'll update the list as we get more prices.
Glad Nintendo's been doing sales so much lately.
EDIT: The Ubisoft games go on sale starting tomorrow; the Atlus games are on sale now. Atlus's sale runs through to August 31, Ubisoft ends on August 27.