My local amateur radio club informed me that the US Frequency Allocation Chart for 2003 could be ordered from the US government printing office Web site for $4.25. This is an impressive wall chart showing frequenices allocated by the FCC. I ordered one for my office.
There are .pdf versions available as well. The one-page graphical version is just barely legible, depending on the quality of your printer. The "text" version is 88 pages, but all entries can be read. I don't recommend bothering with that document though.