Universal Currency Converter
Currency conversion for any given amount of money
http://www.xe.com/ucc/

Currency Converters
From Oanda.com, a variety of historical and current currency converters.
http://www.oanda.com/channels/products/products.shtml

What's a Dollar Worth?
Give a dollar amount for a particular year and find out what that amount is worth in another year.  Hosted by the Federal Reserve Bank of Minneapolis.
http://www.minneapolisfed.org/Research/data/us/calc/