I added all the stuff I could identify to the dependencies.xml file, so now it should have the listings for everything that maven and the plugins require, and if you get all those things downloaded, you can do an offline build successfully.
Unfortunately, running the basic build for that script doesn't download all the dependencies, because there are multiple versions for some artifacts, and Maven will apparently only download one of each. If anyone knows of a way around that, it would be great. Aaron P.S. ActiveMQ: Please update from Axis 1.2-beta-2 to 1.2-RC1