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Here is one example of stem cell sources. However, recently in the news, I think I heard mention of a focus on adult brain stem cells. Will keep an eye out (I deleted my last really good resource from a news research alert I get once a week).
http://www.family.org/docstudy/excerpts/A0014318.html
Focus on the Family Statement on Human Embryo Stem Cell Research
Stem cell research is a new frontier in medical science.
This type of research made headlines in late 1998 when scientists succeeded in
isolating and culturing stem cells from human embryos. Scientists have also
derived stem cells from aborted fetuses and adults.
Embryonic stem cells are the earliest cells from which body organs are
developed and have the ability to grow into the 210 types of tissue in the human
body. Recent medical research indicates that embryonic stem cells may hold
tremendous promise for treating such conditions as heart disease, cancer and
diabetes. Focus on the Family opposes stem cell research using human embryos. In order
for scientists to isolate and culture embryonic stem cells, a living, human
embryo must be killed. It is never morally or ethically justified to kill one
human being in order to help benefit another. By requiring the destruction of
embryos, the tiniest human beings, embryonic stem cell research violates the
medical ethic of "Do No Harm."
Pat's
emphasis: Opposing the willful destruction of human embryos
for medical research does not mean that stem cell research cannot proceed. Focus
on the Family encourages scientists to continue to explore stem cells found in
adult tissues, bone marrow and umbilical cord blood. Initial research using
these sources are considered to be very promising, even more
promising in some instances than embryonic stem cell
sources However, scientists
admit they have far to go before mastering the complicated and rapid process of
stem cell growth and development.