If you're a Oiselle fan, you know that Rule 40 is in effect starting today. That means non-Olympic sponsors can not reach out to their athletes until the enforcement window ends Aug. 24, and athletes cannot tweet and/or thank their sponsors in this time frame either. The one time small businesses can really be seen on the world stage, and they're stymied.
If you're interested in a list of track and field athletes not sponsored by Nike, and who can't thank their sponsors for believing in them and getting them to the Olympics, you can follow this link to Oiselle's blog. Their sponsors did all the work, but the USOC and IOC want all the credit.