Looks great BM, it's SURE to be a hit!
Love the removable drip tray....you might find that, especially outdoors, the tray may be more hassle than it's worth...
The only thing I have to say that I would do differently, is that as great as the stained board looks, I really liked the way the taps followed the curve of the front of the bin when they were fitted directly to the plastic. The board just doesn't follow the curve and sticks out quite a bit on both ends. I would have maybe used another material that I could curve around the bin and get back that nice curved effect on the taps. I am thinking a piece of checkerplate/stainless/aluminum etc that would roll rigth around it. Another option might be a piece or possibly a double thickness of lamanite benchtop, like Formica. Then you could use any pattern you like.
Last thing I can see that might be a problem is the spigot. I hope no one steps on it, or kicks it accidently. Not a problem until you piece the liner I guess. rather than poking holes in the bag and using the spigot, you could just tip it on its side, or use an autosiphon to empty it.
Not criticising in any way mate, it's AWESOME!, just doing what I do.. and making some observations.
So what's going to be pouring from the three taps?