Will Addison get her groove back? Kate Walsh plus Taye Diggs apparently adds up to something good - perhaps even steamy ( minus the Mc) - reports the Grey's Anatomy star's new leading man. Offering but a glimpse into what the potential Grey's spin-off has in store, Diggs tells People he and Walsh "have really great chemistry." The chrome-domed Daybreak survivor divulges little else ("It's a secret!" he reminds the mag), but does say they had "just finished" lensing the two-hour backdoor pilot and, "We're hoping people dig it." Or did he mean Diggs it?