Is there an update to the We.Gov / We.Finance reference sites for AEM Forms in 6.4?
The list of available packages at https://helpx.adobe.com/aem-forms/kb/aem-forms-releases.html suggests not.
AEM Forms reference site packages are available ,  and corresponding documents are updated to include additional use-cases . The key focus area for AEM 6.4 Forms is multi-channel customer communications. Forms reference sites are updated to include some real-world use-cases (Auto Insurance Letter, Credit Card statement, Wealth Management prospectus) to showcase OOTB Interactive Communications (multi-channel customer communications) capability.
 FSI reference site package: https://www.adobeaemcloud.com/content/marketplace/marketplaceProxy.html?packagePath=/content/compani...
 GOV reference site package: https://www.adobeaemcloud.com/content/marketplace/marketplaceProxy.html?packagePath=/content/compani...
 Documentation: https://helpx.adobe.com/experience-manager/6-4/forms/user-guide.html
We are preparing the sites for AEM 6.4 Forms. We will let you know once the updates sites are pushed live.
That's great, thanks for the update.