Trados 2007 used to have the ability to convert units as well as localize them. So go from inches to centimetres for example, or GBP to Euros. This feature was actually removed because of a lot of adverse feedback from users where rounding errors and other problems were sometimes causing the translation to be incorrect.
I would like to see this feature brought back in but with an editable configuration. Conversion figures and abbreviations, as well as the freedom to create your own. It should also be possible to turn off the feature of you don't want it.