@Steve and @xCausxn, the vbulletin plugin is released.
@Steve Thanks again for your db dump.
you don't need to install it, just select it from the list of source exporters in the config.
It's not yet compatible with nodebb@master, you need to use the latest stable release.
Also, I recommend that you use the latest importer plugin firstname.lastname@example.org
rm -rf node_modules/nodebb-plugin-import
npm install nodebb-plugin-import
npm update nodebb-plugin-import
# then activate it from the ACP and use it in there.
Also, after the import is complete, you can use the post-import tools to convert the BBCode to Markdown
Let me know if you're having issues.