I was just reading the New Market Wizards interviews last night, and it was a somewhat good read - especially on FX and currency futures which interested me mainly.
It seems it was much easier in the more inefficient markets back then, so I don't know how much credence we should put into their stories applies to markets today. I will certainly be interested in info from someone who makes it very big today, as I gather that is much more hard work.
Seems like, market makers or not, the currency pits were a place of peace and calm in the beginning and a lot of naïve opinions and traders.
I think that there are players making the currency futures look like market making anyways - esp. with regards to CME members benefits and the lines of credit they get.
edit: 4 and 2 pips profits on 2 trades where I bought below 1.229-level on EuroFx. I am not able to "keep sitting" in this market, and although I use a lot of leverage I at least scale in like some other successful traders say they do. Scaling out is something I do not do so well, but I can't be in a trade all the time and don't have quote-screens all over the place like Lipschutz.

I of course recognize that the big profits are in taking the long trends, but I am not that good (yet?) and therefore prefer my smaller profits - although I make much more money now than any time I was working. I am creeping up on doubling my trading-balance, so that will be a little milestone.