The House passed that bill for National Food Labelling Uniformity. I looked it up on Thomas (I hope that link works) and it evidently doesn't affect organic food labeling:

(g) No Effect on Certain State Law - Nothing in this section or section 403A relating to a food shall be construed to prevent a State or political subdivision of a State from establishing, enforcing, or continuing in effect a requirement relating to--

`(1) freshness dating, open date labeling, grade labeling, a State inspection stamp, religious dietary labeling, organic or natural designation, returnable bottle labeling, unit pricing, or a statement of geographic origin;