Just a quick question. I used SEO Canonicalisation Plugin for Joomla 1.5 sites. I'm about to launch my first Joomla 2.5 site, but cannot find a plugin that will do the same job.

You can try to convert your plugin from 1.5 to 1.7 so you can install and using on Joomla! 1.7 and 2.5 or later.

Read more about: How to convert a simple plugin for Joomla! 1.5 to 1.7