Un*x and Linux users can HotSync their Punch Time Clock data using ColdSync.
You can download the Open Source Punch Time Clock conduit here
This version only supports a dump of your handheld data to a text file.
The source is included, and this version is very beta, so only use it if you are familiar with ColdSync and perl. It also requires the p5-Palm package you can download from the ColdSync site.
Feel free to modify the source to your needs, and please let me know of any
bug fixes or changes that you would like to have in the "offical" distribution.