Entrepreneur has a handy "Ask the Candidates" feature that shows John McCain and Barack Obama's answers to questions posed by real small business owners as well as an at-a-glance summary of the candidates' positions on economic issues.
The Small Business & Entrepreneurship Council has made a side-by-side comparison chart showing  Obama and McCain's positions on "key issues of concern to the U.S. Small Business and Entrepreneurial Sector." You can view it here. (Opens as a PDF) While the organization expresses opinions about the candidates' stances on its website, the chart appears to be a non-partisan summary.
Other interesting reads:
Business Week interview with Ralph Nader: "Why Small Business Owners Are the True Capitalists"
WSJ's Independent Street blog:Â "Small Business Speak Out About Economic Woes"