If you're using Tomcat4.x, you will need to make the following two changes to get the multilink functionality working.
1. Modify your <taglib> element to include a <shortname> tag. The text of this tag can be arbitrary. So your taglib element will look like the following:
2. In MultiLinkTag.java, you will need to change EVAL_BODY_TAG to EVAL_BODY_BUFFERED. If the java file doesn't compile for you, place tomcat4.x\common\lib\servlet.jar first in your classpath.