WHMCS has released the first beta of WHMCS 6. We have tested SoluteDNS's compatibility with this new major release of WHMCS and found SoluteDNS mainly fails handling the client interface. For this reason we have decided to start developing a 0.2.x branch of SoluteDNS for WHMCS. We are currently investigating the possibility to merge the Blesta development with the 0.2.x branch of WHMCS in order to be more future prove.
As you will probably understand this decision has major impact on our current work scheme. We are currently working on a reschedule of our development resources and will keep you informed in this topic about the progress and the impact on the 0.1.x branch.
Also check: http://www.solutedns.com/blog/723/a-developers-update/