Transmission Failure problems of the 2003 Lexus RX300

I have a 2003 Lexus Rx300 with 134,000 miles. The transmission failed on 2/20/09. After a couple of days of a slight whine, three lights came on the dashboard. I took it in to my local repair shop. They ran a computer diagnosis and it came back with transmission failure. I purchased the vehicle while still under warranty at 48,000 miles in 2006. I have had the transmission serviced twice at the recommended intervals. It was due for a 3rd service. Internet blogs report that transmission failure is a chronic problem with this vehicle after 70,000 miles. In almost 40 years of driving, I have never had a transmission failure before. I owned a Lexus es300 previously and volvos before that. The Lexus dealer says it is out of warranty. Cost of replacement is quoted at $4200.