Facebook (FB) roundup: 1) AllThingsD backs up reports Facebook is in talks to buy Waze for $1B. Waze would bolster Facebook's efforts to become a go-to source for local content (and push local ads along the way), and Facebook's reach could greatly increase the value of Waze's crowdsourced map/traffic data. 2) Facebook Home surpasses 1M downloads ahead of an update. But its user rating remains 2.2/5, as users keep griping over a lack of widget/folder support. 3) Leon Cooperman pounds the table for Facebook. "People underestimate the mobility opportunity that exists ... we think they could achieve a market cap comparable to a Google."