Quoting
primesuspect
Discuss Mat's discovery of a Bluetooth connection issue in PS3 wireless controllers in this thread after reading it on the front page.
One of the members at AOAForums have pointed out the Logitech Z-5450 Wireless Speakers review at TrustedReviews (sorry, can't post links yet). In that review they note issues with the Logitech speakers and Wi-Fi. This very well might actually be an issue with the Logitech stuff, rather than the PS-3?