Have been there twice and can already tell this will be a regular happy hour stop to meet friends. Great service and atmosphere, and the space is REALLY beautiful. Favorites are the scallops, tagliatelle with sweet corn and smoked mushrooms, and the pork shoulder.
Despite what another commenter said I thought the wine list was exceptional and had some really reasonable prices on some great bottles. And obviously the cocktail menu is something that sets Oliver's apart from almost any other restaurant in Madison.
On my second visit the bartender said they rent parking space from some neighboring businesses for customer use, make sure you look that up on their website if you prefer not to park on the street.