JARs will be available soon. (UPDATE: The JARs are available - this page needs updating @ Feb2010 - still useful info)
A beta-video is available through the video resources link in the menu. SVN checkout is done roughly like this. It will reproduced for experienced developers to watch and set up in minutes whereas a noob java developers can sit through a step-by-step 10 minute setup video for your IDE.
If you plan to connect with a Serial Port, you'll need to download the RXTX Serial Port libraries for java. If you're on linux, watch the video in the video resources section. If you're working on OS X, then follow these instructions:
Copy the RXTXcomm.jar file to /Library/Java/Extensions
Copy the libSerial.jnilib file to /Library/Java/Extensions
The PL2303 sourceforge project for os x works for certain USB-serial dongles
mkdir /var/spool/uucp
chmod 775 /var/spool/uucp
mkdir /var/lock
chmod 777 /var/lock