We are currently testing this plugin with XF 1.4.4 and joomla 2.5 and do not manage to make the dual login working (it works from Joomla to XF but not the other way around).
Is anyone having it live on its site and who could help us ?
Yes I agree. We wanted first to test the existing plugin to see if we could make Joomla 2.5 (our current version - already working on upgrade to joomla 3) and XF work together but it seems this is a loss of time.
As JFusion does not take in charge any development for Xenforo and as the great Coop seems to have gone away, I am currently looking for a developper that could do this job.
If anyone is interested to share the cost, we could fund this development together ?