I'm happy to take over, even though I'm working on my own sitcoms, I've still got loads of free time and I'd be happy to get something going with this.
What I think should happen is, we get an idea for the sitcom, then plan out the plot for the first episode (it doesnt have to be the first episode in a series, just a random episode), get the plot perfect so we know what needs to happen and what needs to be revealed. And then characters can work their dialogue in around that.
Here's my idea..sticking with the phobia angle, but not in a self-help group situation. What I'm thinking is these 5 or 6 individuals all who have different phobias have been sent on a trip together to bond and help each other overcome their phobias, they could go stay at some kind of camp? Or house? Hotel? Just any place where they can get into comedic situations. But the thing is rather than helping each other they decide just to have fun, yet their phobias come into play from time to time, this could easily run for 6 episodes.
I had an idea for how it could start, and thats they get told by the organiser of this self-help trip that they will be going to a place, free of the type of stuff and situations that are likely to distract or provoke them. But when the 6 guys get to the place they mistakenly go in the wrong say hotel (for now) and one of them maybe says "Are you sure this is the right place?" to which most of the others answer "Yes"...this place could then have a casino, therefore distracting the gambling addict, it could have lots of pretty women to distract a sex addict etc etc.
Just writing that above has made me think that its more about addicts now rather than phobias, but I suppose it could be a blend of the two.
Anyway your thoughts?