Namco Bandai has a number of opportunities for Naruto fans to try Naruto: Ultimate Ninja Storm with or without a PlayStation 3. Anime Expo and Comic-Con attendees can play the game on the show floor. Once you practice partner attacks with pre-time skip characters you can enter in a tournament to win unannounced prizes.
If you won't be in Southern California next month, you can get a demo of Naruto: Ultimate Ninja Storm on July 3rd by downloading the monthly issue of Qore. The demo is a timed exclusive for PlayStation Network users that purchase Qore. Two weeks later the demo containing Naruto and Kakashi will be available to the general public on July 17. Other characters confirmed to be in the final game through various screenshots and trailers include: Sakura, Gaara, Shino, Rock Lee, Neji, and Sauske.
Images courtesy of Namco Bandai.