This is a bit inside-the-beltway, but the fact that the very socially conservative (oh, let's just say reactionary) Washington Times is abandoning some of its most egregious anti-gay stylings (using "homosexual" instead of gay; placing scare quotes around the "m" word in "homosexual 'marriage'") signifies something.
Real advances for gay legal and social equality come not just when the convention-abandoning left "progressives" move on (sometimes to positive effect, sometimes destructively and hubristically), but when the hidebound, clinging-to-tradition, puttin'-on-the-brakes other leg of the national psyche advances, albeit much more slowly, in the forward direction. That's why while the Democratic nominees clearly far outpace the GOP on matters gay (at least rhetorically), the fact that McCain is somewhat of an improvement over Bush (i.e., as when he called the proposed federal anti-gay marriage amendment "antithetical in every way to the core philosophy of Republicans") still registers as important.
More. Scott Tucker, communications director for the Log Cabin Republicans, makes the case that if you happen to be gay and Republican, you can feel comfortable voting for John McCain.
Furthermore. Jonathan Rauch shares his thoughts in For The GOP, A Tonic Named McCain.