I have yet to see a company or firm integrate the John McCain brand into their own identity the same way that Barack Obama's has been used in conjunction with existing business identities. The New York design firm LOLZ has combined its logo and the Obama "O" as sign of solidarity and self-promotion for its unofficial Obama site. And my favorite vinyl toy company, Kidrobot, is touting Kidrobama with an integrated logo (below) that juxtaposes product and candidate.

The Obama logo is designed to fit perfectly into any agenda. There's now a site, Logobama '08, that invites you to customize your own Obama logos, even if you're not voting for him. Check out these counter-logos here (bottom) and the Flickr page here.