Ha, well there you go gava I've actually bought stuff off you before. T-moulding and some player buttons by memory (got the other gear off ozstick because I went Sanwa all the way).
Re: outputs for beer dispensing, Ond on the said forum put together what's probably the best home-made arcade system in the world (no kidding). He used outputs from the software to connect to a stepper motor, which determined the position of a rotating monitor. It would be harder to get something from in-game though but Moad's post might address this.
Was thinking... maybe hook up an output from the coin slot so that it dispenses beverage when money is added? You can see I have a lot of respect for visitors.