Can you define "not working"? Does that mean the LEDs are on all the time, off all the time, the motor is jerking but not rotating. . .or does it just behave exactly the same with power hooked up as it does with no power (i.e. it just sits there like a lump when you turn it on)?
Like Mike said, disconnect the motor and try again.
Check the voltage coming out of the power supply.
Check the voltage at pin 8 of the op-amp.
Double-check to make sure that the LEDs are in the right way 'round.
Look very very closely to make sure you don't have any solder bridges. It's quite easy to accidentally join two pins with a tiny bit of solder which can bugger up the whole thing.
That said, unless there is a dead short somewhere or the power supply is dead, I'd expect that at least the motor would turn, even if the fading LEDs portion of the circuit didn't work.
What are you powering it from now?
I'd say that using a socket is a really good idea unless you expect the circuit to be in a high-vibration environment. It eliminates the chance of solder heat killing an IC and allows you to easily swap in another IC to test.
Hopefully you still have your test prototype circuit set up so you can triple-check the connections.
Do you have a camera which can take good closeups? Cell-phone cameras usually have crap picture quality but a decent digital camera will often have a macro or manual-focus mode which allows you to get quite close. If you can post really clear, close pictures of both sides of the circuit board, perhaps someone will be able to see something you missed.
OK, back to my housework.
Torben