I have downloaded the source for the latest SolidDB engine for MySQL and modified it to compile on Mac OS X PPC operating system. There were no new changes in my modification process, so any differences are specific to the engine and will be bug fixes and new features.
I have made a precompiled binary available for version v0064.
SolidMySQL for Mac OS X (PPC)
Please email me at info@cybersite.com.au if you have any problems with the binaries running. If you have issues with the storage engine itself, please read the documentation and forums at the SolidDB website.