Thankfully, no one was hurt.
Being friendly doesn't mean sharing every secret or disregarding competition. After all -- you're both after customers in a crowded marketplace. Just realize that strategically aligning with the competition can make your business better. McDonald's needs Burger King; FedEx keeps UPS on its toes. Healthy business rivalries help stave off complacency and will make your company stronger in the long run.
Transparency is one of those words that is constantly thrown around in the business world. Many companies make claims of an increased commitment to transparency, but approach these promises under the simplest definition: openness and honesty in business practice.