The George W. Bush era is thankfully gone, but HBO and Venables, Bell & Partners channel the former president's less-than-lucid vibe and penchant for incoherent phrasing in this banner and billboard push touting the DVD release of the Will Ferrell special You're Welcome, America: A Final Night With George W. Bush. The election-poster-style ads include Bush-inspired slogans like "Never misunderestimate me," "Celebrate the era of strategery," "Mission still not accomplished" and "Back from the