Google Calendar in gmail… or even notifier?

My one grumble with Firefox 3 is that I’ve lost my GCAL notifier that used to sit so sweetly next to my gmail one.

So I was kinda excited upon finding a few neat greasemonkey hacks to get round that… all of which were out of date, however, with the exception of Gmail Add Ons.

Which, while current, just isn’t working with FF3 :( At least as far as I can tell… and I’ve already spent a good 60 minutes trying to save myself time in future so I think it’s time to give up.

Anyone else have gcal working in their gmail sidebar (or even, sob, in a notifier)- by fair means or foul, in Firefox 3?