From the World Productions website (doesn't give much info.)
BBC2 has commissioned us to make NEVER BETTER, a comedy in 6 X 30 minute episodes, starring Stephen Mangan (Green Wing).
Filming is scheduled for this summer for transmission in Autumn 2007.
I don't know when the info was posted on their website.
Edit: From a fansite:
Steve's up and coming projects include a new 6 part BBC comedy series called Never Better which is about someone attending Alcoholics Anonymous. Its due to air in Autumn 2007.
There you go.