I've noticed that Outlook 2010 is creating a 0 byte file in the form CVRXXXX.tmp.cvr each time it's launched. Files are created in C:\Users\<username>\AppData\Local\Temp. However these are not being deleted which leads to a large number of .cvr files in \temp over time.
The maximum possible victory tax on the bonus for each gold medal, using the top tax rate of 39.6% for the nation's highest earners, is $9,900, according to Americans for Tax Reform. For silver, it's $5,940, and for bronze it's $3,960.
The medals themselves are taxed, too, but they're not as valuable as their shiny goodness may appear. Based on the commodity prices of the metals involved, gold is worth in the neighborhood of $600, silver about $300 and bronze next to nothing.