Remember that song, "Everything Old Is New Again"? Well, it's true. In the old days of broadcasting, it was typical for the host of a show to appear during the hour or half-hour doing a live commercial endorsing the sponsor of the program. That old idea is being re-invented and ABC will soon announce that Jimmy Kimmel will be doing live spots on Jimmy Kimmel Live. Call it the ultimate in product integration, if you will, but it's just one more way for advertisers to guard against DVR watchers zapping through the commercials or live viewers clicking to another channel. And if they're smart, they'll make the commercials clever enough to be worth watching. The live ads will launch in May.