I started reading this thread last year when I got a Kobo Mini, to add to my Kindle. I specifically got a Kobo so I could borrow ebooks through my local library (most of the libraries here in Oz don't su pport Kindle for some reason), but have since found that most of the books I have purchased have been for Kobo as they are usually cheaper, thanks to the codes that are regularly offered.
On that, thanks to whoever originally posted about the code this weekend.
I got busy, and cleared most of my very extensive wishlists. I originally purchased through the Oz site, then when the only books left to purchase were the agency books that the code wouldn't work on, I travelled to India and finished off my purchases.
I think I've blown my book budget for the year - 380 books for about $250
I think I'm set for the rest of the year
Thanks to the posters in this thread for all the useful info.