With President Obama’s sudden supportive statement about gay marriage, there’s a lot to talk about already on tonight’s show. And one of the guests, promoting Sunday’s finale of ABC’s Desperate Housewives, isn’t your usual suspect on this kind of talk show. She’s Eva Longoria, who plays the pampered Gabby on that long-running prime-time soap. She was booked before Obama made his statement – but now, given the specifics of many Housewives subplots and supporting characters, it almost seems like clever planning.