The USDA released their new nutritional guidelines (updated every 5 years). I thought it was interesting to read directly from the source, rather than filtered through the media.
For those with only a little time, you might just want to read the executive summary.
The full report contains more detailed information, including their methodology and links to the supporting evidence used to formulate the guidelines, as well as information on particular food groups (protein, carbs, etc.).
A few things that I found interesting:
Potassium reduces the effect that salt has on blood pressure. Go bananas!