Review for RemindIt by Justin
Rated 4 out of 5 stars
I'm not as bothered about the status bar... I have however noticed that I can not add email accounts while this addon is enabled. I have to disable, add account, and reenable (with a few TB restarts sprinkled in there).
I haven't really put this puppy through it's paces yet though but in my simple testing it works.
To create your own collections, you must have a Mozilla Add-ons account.