At this time, we don't have plans to build connections with any integration platforms beyond Zapier.
It looks like Claris Connect allows direct integration to APIs, however, so you would have the option to work with an independent developer and add whatever behavior you want to your integration by accessing Wave's public APIs.
Hope that helps.
Thank you, Paul.
That's obviously a lot of work for a single task. I will consider using Wave, but may need to look at other options as well. There is SOME Zapier support for Filemaker Pro, but it's not reliable so may not be the best solution for accounting.