We are working on upgrading all extensions to be compatible with MySQLi, we recently updated eCart and are working on Design Extender and Data Bridge. I Don not have a time frame for when the Data Bridge upgrade will be available though.
The MySQLi extension is the first step needed for the upgrade, just as the original MySQL functionality was built on the ground work of the built in dreamweaver behaviors, we needed to recreate that ground work with the MySQLi extensions before starting to work on the other extensions.
We will release the upgrades to the other extensions as quickly as possible.