Yes for both questions.
Maintining the N.A.P(Name, Phone, Address) with your google places page and your website and with all local directories and basically all web properties are crucial for ranking, as it shown here by David Mihm.
Having your NAP on other web properties are called "Citations" and these are considered like links to your actual website. so the more you have uniformed NAP citations accross multiple web properties will increase rankings.