Google has added two new features to their SMS (text messaging) service that are available by sending a text message to: 46645
First, Google has added translation.
"Translate a word or simple phrase to any of the following languages French, German, Italian, Portuguese, and Spanish from or to English."
Second, Currency Conversion
"To convert a currency to another currency simply enter the conversion you'd like completed."
Details about using both of these new features can be found here.