Can you use SQL Server Developer Edition with SharePoint 2013?
Would each service account need a license?
Has anyone done this before?
Yes you can install SharePoint owith SQL Server Developer edition. Check this
Licensing SQL Server for Non-production Use
The SQL Server 2012 Developer Edition is a full-function version of the SQL Server software—with all the features and capabilities of the Enterprise edition—licensed under the Developer Tools model, which is a “per user” model. One license is required for each person that accesses or uses the software.
I never used this as we Have MSDN subscription so we use that license.