just making sure you saw this, since the thread flipped to a new page.
IF you are serious, and would like to sign up with a local who can coach you in a very natural organic sort of way, shoot me a PM. Sessions with the person who offers this service occur over lunch (which you buy) and are pretty cheap and educational as you learn also about certain cultural no-no's and things to do. I think she charges about 15 or 20 bucks, plus lunch, and you have to do 3 sessions minimum.
Books are fine but there is a cadence and rhythm to patwa which needs to be heard. There are also dialects within patwa as well, but I don't think the casual learner needs to worry to much about that. To me it's just awesome to hear people move beyond "likkle" and "bokkle."