I don't really think people should have "moral problems" with embryonic stem cell research. Human embryos left over from IVF are (mandated by law) thrown in a bin. Is IVF immoral?
Embryonic stem cells have many, many reasons going for them over adult stem cells, not least of which a lower potential for developing into cancer. In terms of basic medical research, they are - for want of a better phrase - a godsend. Adult stem cells are not as good.
Why should "moral issues" about trash from a process that brings the joy of children to many stop genuine medical advances?
Anyhow, clinical trial entry in the US is dependent on the person receiving the trial therapy signing a waiver saying that they understand what they're doing. The worrying thing in this circumstance is that these people are desperate, which never helps clear judgement.