@farbspiel: possibly, but not sure yet. From what I've read, using this XML format is optional, not compulsory (and the document there states this explicitly). Like Diego, I'm hoping to see some examples first, rather than try to pioneer it myself, and taking 10x longer as a result...
Just reading the document is a bit depressing - there's stuff in there that it doesn't look easy to map the available data from WooCommerce onto. e.g. service type codes to indicate different product types. So, that means adding new features to WooCommerce to allow the SAF MOSS category to be indicated, for each product.
@Diego - do you have a Taxamo account? Have they got an export facility for this yet?
David