Version 1.5 has been released! This now offers a widescreen mode with additional information, reduced CPU usage, and new command-line options.
Source package and Windows installer are now available on Sourceforge, an optimized build for the Asus EEE (and probably other UMPCs) is on the homepage.
A Zaurus version will be available shortly
The source code is now available for Linux and other systems. It shows up as version 1.3.6 since there were a number of changes that needed to be made to get it into a releasable state.
Windows and Zaurus binaries can still be found under 1.3.5. There is no point in doing 1.3.6 builds for these systems since the changes aren't noticeable to the end-user.
YaKi 1.3.5 binary releases for Windows and Zaurus have been uploaded. Source code for Linux and other platforms will be available soon.