This breakthrough in stem cell research is good, and potentially momentous, news. But the timing couldn't be worse with the House is set to vote today on loosening current restrictions on stem cell research. From today's Washington Post:

Acutely aware that their new work could undermine that key political goal, the scientists cautioned that their success with mouse cells does not guarantee quick success with human cells. They called for Congress to pass the bill, which would give federally funded researchers access to embryos slated for destruction at fertility clinics.

In the long term, today's ethical concerns may be made moot, but we're not there yet and moving forward on embryonic stem cell research makes the most sense.