i didn't see anything here regarding support (or not) for running the client on the mac, so here goes...
i can report that the eclipse plugin worked fine for me on the mac (eclipse 3.2M6). easy to install, just dragged to the plugins folder. no other special setup required.
i also tried running the standalone (linux) client on the mac. it worked with a little tweaking of script. it would be great to create a downloadable pacakge that includes the required os x versions of the swt libraries, wrap a simple mac installer around it, and ship.
what i had to change:
modified the projectcards-gtk.sh script to use java 1.4 (the current standard jvm on the mac platform is 1.5). i'm not sure whether this really mattered.
i downloaded the mac os x version of swt from the eclipse website and modified the projectcards-gtk.sh script to use the swt library from there instead of from ./linux/gtk/swt/swt.jar and also added the swt directory to the java.library.path instead of ./linux/gtk/swt
after that, things worked fine.
i tested on a powerpc mac, i think this should also be doable for intel-based os x systems. you just need the appropriate version of swt.
