Here's my submission: Please use the correct symbols for international units. The symbols for units are set, according to an international treaty, by the CGPM; the AP does not have power to set them. Two units commonly used with the wrong symbol are the kilometer per hour (km/h, not kph) and the microgram (µg, not mcg, not ug).
When sources give measurements in metric units, such as the Chilean mine accident 700 m underground, there is no need to convert them to units we got rid of over 30 years ago. When different sources use different units, you should convert them all to metric for easy comparison. The metric system has prefixes for powers of 1000 up to 10^24. The average American probably hasn't heard of a yottagram, but he has heard of a gigabyte and possibly a terabyte. Please use prefixes appropriately. I suggest 40 Mm, rather than 40,000 km, for the circumference of the earth and 150 Gm for the distance to the sun. -- I believe in Yellow when I'm in Sweden and in Black when I'm in Wales.