Media Logic sells a Windows program with a variety of U.S. aggregate data (specifically, all 256 series from the BEA's Survey of Current Business), and to demonstrate the program, they have made these series available in both graphical and numerical form. The graphical form is from their program, and the numerical form is in .wks files. Information on their software can be found here as well. NetLink also contributes to this experiment.
http://www.cris.com/~netlink/bci/