With one day to go before the House Judiciary Committee is scheduled to vote on the controversial Stop Online Piracy Act, the maneuvering around the bill is going hot and heavy. On Tuesday, committee chair and chief sponsor of the bill Rep. Lamar Smith introduced a so-called manager’s amendment that tweaked a few of the most controversial in hopes of peeling off some the opposition to the overall bill. Advocacy groups in Washington that were opposing bill were unimpressed, however, and are still opposing it. Several tech heavyweights, including Google’s Sergey Brin, eBay co-founder Pierre Omidyar, along with some leading VCs from Sand Hill Road, fanned out across Capitol Hill yesterday to try to rally opposition to the bill. Meanwhile, Rep. Darrell Issa today is expected formally to introduce the Online Protection and Enforcement of Digital Trade (OPEN) Act, an alternative bill designed to give Congressional opponents of SOPA a vehicle for voting in support of an anti-piracy measure without having to vote for SOPA itself. Your tax dollars at work.