WITH all of the celebrity restaurant appearances these days, you gotta wonder - does anyone cook anymore?  Last night, Britney Spears was spotted out to dinner at Sur restaurant in West Hollywood. The "Gimme More" songstress looked flirty in a black-with-embroidered-designs minidress teamed with a pair of massive platform heels and an oversized black handbag. Meanwhile, her ex-hubby Kevin Federline was spotted on the opposite coast, doing a little shopping with some guy pals in Miami, Florida.  He looked cool and relaxed in a baggy grey t-shirt along with a pair of shorts and white sneakers. As far as their ongoing custody case, it seems Brit and Kevin are indeed headed back to court this August.   A recent meeting with a mediator reportedly wasn't enough to settle things. K-Fed's lawyer, Mark Vincent Kaplan, told press, "The mediation didn't result in an agreement that would avoid the trial set in August ... The mood was comfortable, positive and it was a mood that was consistent with opening at least a great dialogue, which is necessary."