Official details are emerging on RivaBella, West Hollywood's soon-to-be-realized Italian opus from Innovative Dining Group, operators of Sushi Roku, Katana, Delphine, Soleto, and Boa. Taking over the former flagship of Hamburger Hamlet on Sunset Boulevard, the restaurant will embody a Tuscan farmhouse feel designed by Studio Collective, with nearly two-thirds of the dining space dedicated to an al fresco patio. Emilia Romagna-born Gino Angelini, the former Rex and Vincenti master-chef who oversees his own celebrated Angelini Osteria, will have a well-deserved pedestal here as executive chef and partner. We're dying to know how Angelini's hand-crafted and cozy cooking will translate into 8,000-square-foot of the kind of glitzy, smooth machine typically engineered by IDG, which typically bleed a little of the club life into an upscale restaurant. Finally, we have some idea.