Thanks so much for ubercart, it's simply lovely.

I've found a minor bug in uc_store.module that causes the [store-email] token to be an empty string. Line 364:
$values['store-email'] = variable_get('uc_store_email_from', '');
should I think be:
$values['store-email'] = variable_get('uc_store_email', '');

I initially modified it to use the uc_store_email_from() function (that puts the store email into the form Store Name ), but this doesn't make much sense in most places the token would be used (eg invoices and pages).