Try PubMed. Regarding embryonic versus adult stem cells, the cell therapy data for the heart is a good place to start. There are data demonstrating that embryonic stem cells can form teratoma's in the heart (tumors with cells/tissue differentiated into multiple different lineages; e.g. teeth, muscle, hair), and that adult and cord blood-derived 'stem' cells do not do this. There is an upside and a downside to omnipotency in stem cells. Adult and cord blood-derived cells might have less retained ability to differentiate into multiple cell types, but they are also arguably less risky for this reason.
Hope this helps.
Agreed, Pubmed is your best bet, which is the NCBI link given above. Even when you can't access the full article, you may get good pointers from the abstract.
Thanks for your post. I did pull up PubMed and I'm looking through the articles now.
Boy, there is a lot of information. It would be nice if I could translate the titles and articles into layman's terms. :-)