i'm all for people getting healthier, but i don't know that i'd place so much emphasis on omega-3, & -6 fatty acids, when they are a small (but yes, essential) part of the overall key to a healthy diet.
unless you have your daily "diet" in order, there's really no reason to supplement anything. you can get 3's and 6's from foods, and eating the whole food is much healthier for you than using a distilled supplement. rather than buying fish oil, buy some fish (whitefish, salmon, halibut, etc.) ground flax seed, walnuts, shrimp, halibut, tofu, etc... no need for supplementation!
i've been researching this concept recently, and while i haven't found a lot of scientific research to back it up, it does make sense to me.
one thing to remember - there is no "miracle pill" you can take which will suddenly correct all of your issues. research, learn how your body works; optimize your diet with a goal of balance; until you understand how your body works, temporarily monitor your caloric intake/expenditure. (if you're trying to lose weight, it's entirely possible that you're eating *too few* calories, so your body is in "starvation mode" and storing anything it can get it's hands on!)
and if it seems to overwhelming, by all means, ask someone you trust for advice/direction - but remember, don't take anything you hear as gospel! ask/read many sources, compare what they all say, and make your own decisions! (i guess that applies to everything in life, huh!?) =)