SP1, no - I didn't go to Haiti after the earthquake but I have worked there in the past. I contributed from this end in several ways.
I really think that someone who doesn't know their way around, doesn't speak Kreyol (French is not enough for Haiti), doesn't have local contacts and doesn't have a particular area of expertise is just a liability - yet another person in need of shelter, food, water, interpreter, guidance and protection.
Unless you can find an organisation that is prepared to provide this for you and can put you to some use, there's no point. You can't just turn up off your own bat in central what-used-to-be-Port-au-Prince and announce that you want to help. There are plenty of people already there who can provide what you have to offer.