Got another email today for 25% off "select ebooks" for July 4 (Independence Day in the US):
http://kobo.chtah.com/a/hBP8rVHB8bGD...MLeSBz/kobo11b
Promo code:
4825USoffz (expires July 4, 2012 at 11:59pm)
I'm guess this is US only since it's for a US holiday. Here's the full email:
http://kobo.chtah.com/a/hBP8rVHB8bGD...AAMLeSBz/kobo2