This article says they've now 'proved' that egg and sperm can be derived from embryonic stem cells. The article doesn't say if either sperm or eggs could be made from the same person's cloned embryo, but I assume so. Would this be a way for a same-sex couple to get around an egg and sperm law? No, mainly because of safety issues again, which are insurmountable. The article notes that it would have to be proven safe, because "the culture process may cause genetic changes". Also, by definition, eggs come from women, and sperm from men, so even if you created something that had a tail and could fertilize an egg, if it was a woman's gamete, then it could not be called a sperm, it could only be called an egg that functioned like a sperm. This process has already been forseen by the President's Council, which is why they specified that the egg and sperm should be derived from adults in their recommendation.
Also, there are more than just safety issues involved. Even if it were someday safe for two women or two men to have a baby together, we should still prohibit it for cultural/societal/human reasons. People should be created equal, the same way, with a mother and a father. Since we are all just one sex, it is good that the two sexes need each other to cooperate to create a new life, which again is just one sex, again needing to come together with the other sex to reproduce. Sexual reproduction connects us to the rest of humanity not just vertically through our children, but horizontally, through our need for the other sex. Being impossibly created in a laborotory would connect us more to the products of technology and consumerism. We'd empathize with toasters.
But would this be a valid way to restore fertiity for people who did not have healthy gametes? I don't think so, though the goal is laudable (though embryo cloning not the way to go about it). It would not have the last two problems, of course, but certainly would still have the insurmounable safety issue. The only way to justify the inherent risk of childbirth is that it is natural and necessary after pregnancy, and marriage gives couples the right to sexual intercourse which often results in pregnancy. But conceiving a child using technology is not natural or necessary, so that risk can be avoided. There is no right to do whatever it takes to create offspring, for male-female couples or same-sex couples.