Clearwire, billionaire Craig McCaw's latest venture, just selected the L.A. office of DDB to handle its advertising, according to Ad Age. It's a $25 million account, which in local ad circles in pretty substantial. Launched in 2003, Clearwire has raised around $1 billion from big-time invstors that include Intel and Motorola. It's a wireless broadband Internet Service Provider with 162,000 customers worldwide and service in 35 markets. An upcoming IPO is expected to raise $400 million. McCaw, of course, made his money on cell phones and cable TV - and who gave Santa Barbara his ex-wife, Wendy.