Hey just thought I'd chime in to share the great news with everyone :)
Looks like FRENCHIE just implemented an online reservation system as of yesterday.
The same idea as "open table", you click your date, your setting, the number of people, and cross your fingers. It said they open up table 1.5 months in advance to allow people to make shorter-term reservations.
It seems like basically, at midnight (paris time), they will open up tables for the day 1.5 months (or 45 days) later. For example, just now (at 00:15 paris time), they opened up all the table for Nov. 2. and I reserved for 4 at 9:30 pm. Yay!
So just set an alarm for a date 45 days in advance of when you want to eat there, and you'll get a spot!
Say goodbye to reservation woes ;)