I found an interesting resource while looking for more articles on Bush's first veto. The Washington Post has a good special report section that has lots of articles and graphics dealing with the issue. One of the most interesting articles is entitled, "Long Fight Has Slowed Progress on Stem Cells." I also think its interesting that the American public supports such legislation by wide margins as a New York Times article explains:
As baby boomers have aged, demanding the best medical treatments for themselves and their elderly parents, the public clamor for stem cell research has grown more intense. According to the Pew Research Center, a nonpartisan polling organization that tracks the issue, roughly two-thirds of all Democrats and independents favor embryonic stem cell research, while nearly half of all Republicans do.