StyleCaster has raised $4 million in a first round led by billionaire Quicken Loans owner Dan Gilbert. The site — which offers personalized style tips, shopping, and a social network — said it would use the funds to expand internationally, grow its ad network, and create new web-based and mobile apps. It was started in February and claims 200,000 unique users per month, although Compete.com puts its audience at just a fraction of that. There have been other investments in personalized fashion sites lately, including Stylefeeder which raised $500,000 in late May. Release.