For those wanting to do a little light reading, the link below will take you to a matrix at the Tax Policy Center's website which compares the two candidates' tax plans. The Tax Policy Center is part of the Brookings Institute, so this info should be fairly objective. Notice the wordiness of the Obama proposals as opposed to simplicity of the McCain offerings. As in any legislation or contract the more details there are, the more places that exist for the devils to hide.
TPC Tax Topics | 2008 Presidential Candidates' Tax Proposals