Hi Alistair - having a Wordpress plugin for our booking engine and other widgets is a great idea, but with the development resources currently being focused on making a brand new website-building feature, there's little time to spend on that.
However, you can still manually embed any of the Tokeet widgets in a Wordpress site (or any website really) - check out the instructions for embedding widgets here: https://www.tokeet.com/help/add-ons-and-widgets