Blockland for Macintosh is now available as a universal binary that runs on both PowerPC and Intel processors!
Macintosh OSX Universal Binary 2007-07-03 12:00:00
There are also some fixes to sound and keyboard input and a general speed boost, so it's a worthy download for anyone running on the Macintosh platform.
There are some known issues.
Download Blockland 1.031m OSX Universal Binary