The forums are back online :) I switched from BBpress to phpBB, not that there is anything wrong with bbpress but I am more familiar with phpBB and the various options etc in the setups. phpBB is a bit overkill for such a little site but all the features and options are rather fun.
The three users who registered on the old forums will need to re-register but there were no posts apart from mine - so no loss there :)
I've had the odd email go missing from the forums but I think I've sorted out the mail server properly now. Please let me know if your registration mail goes missing.