If getting Acrobat Reader 7.0 wasn’t enough, PDF SpeedUp decreases loading time even more. (Going just by feel, though.) The interface isn’t pretty, but it’s a run once, optimize, close and forget it. Plus, they try to plug AcroPDF before the program closes. Just click “No Thanks”. (Do you remember when I posted about PDFCreator? That one is open source, rather than $69.) I’m blown away.