You've read about it already, but here is a great response to the more than slightly sinister Dymocks email urging their customers to support the ban on parallel importation of books.
Then there's the Amazon censorship scandal, where everybody's favourite non-GST-paying book supplier is denying sales rankings (and therefore levels of searchability) to books it deems to contain "offensive content" (i.e. anything dealing with human sexuality - duh!). There are a few ways to combat this draconian and ridiculous decision (which Amazon have recently fended off as a harmless "glitch", ahem...). The first may be to read and forward this letter. The second, which is my favourite, is to click this link. Say, three times every minute. Sit back and watch the sales ranking rise.