The sources I found for my girlfriend (and some comments), should anyone else want to pass it on...
Here's PBS's Frontline, which has video interviews with their advisors and friends who know them best. Also, if you click on each candidate, under analysis it gives text answers of important events in their political journeys.
http://www.pbs.org/wgbh/pages/frontline/choice2008/
Also, here is the general PBS guide to the 2008 election.
http://www.pbs.org/vote2008/
Next up is the Pew Forum on Religion and Public Life (part of the Pew Research Group). If you click (on the right) on any of the campaign candidate issues, it will give you a run down of what each one thinks on the issue.
http://pewforum.org/religion08/
And because it is relevant to both of our thinking, here is the Pew Research Center's two interviewers/analysts discussing Catholicism and how it is affecting the election (named "Will Obama Win the White Catholic Vote"), based on polling data and what explains it.
http://pewresearch.org/pubs/1016/obama-catholic-vote
Here is the Chicago Tribune's election center. From there you can go to "On the Issues" next to each candidate and it will give a run down of what they believe (warning, its a pdf).
http://www.chicagotribune.com/news/politics/
And of course here is Fact Check.org. Here you can check or search for any facts.
Use it while going through the rest.
http://www.factcheck.org/
...
Hope this helps.