When I go to the above URL it says "Internal Server Error".
I would be OK with moving the COLLADA loader into xith-tk but there is a problem in that it relies upon JAXB. JAXB requires a slew of additional JAR files that are not normally distributed. It might be that in Java 6.0 or 7.0, JAXB will become part of the Java core so no additional JAR files would be needed in the future. In the 2004 JavaOne conference, I was told that this would happen in Java 6.0 but now I am not so sure.
Should I go ahead and add the COLLADA loader to xith-tk with a readme.txt that lists the extra JAR files needed?