YAK version 1.8.0 was released yesterday. This release includes the following changes:

• Add a discount override, to allow for discounts on a per-product basis (useful to get rid of old stock, for example)
• Add option-selection to products. This differs from the categorisation-method of specifying different types of a product, and allows you to setup a selectable range of options (multi-select). Thus you might have a mix-and-match product, where a customer can select 3 out of 10 options, and so on.
• Split installation code into separate file
• Fix a compatibility problem with the exclude-pages plugin
• Add more logging to product update process
• Add threshold-based promotions — promotions which are triggered by the value of the order, rather than by a promotion code/voucher.

I’m currently in the process of updating the handbook to take into account the new features. Those who have previously purchased the handbook will receive an updated copy as soon as it’s done.