www.ontheissues.org is a site that did this for the 2004 election and has similar info for senators. So far it doesn't have any info on the presidential hopefuls for 2008 (or nothing that I could find at least).
I really hope the site adds that info soon. I agree with you that I don't care about anything but their stances on issues and their voting records. A lot of people on these boards talk about wanting a candidate they can respect, and a lot of them seem to have a personal hatred for Hillary. I don't understand any of that. Maybe I'm cynical but I don't think anyone who could make it in politics is someone I could respect.