MTBF goes up, but cards still fail. I've had a Sandisk CF card and a Sandisk SD card fail on me. I was able to recover some of the files, but not all. If you read the luminous-landscape article about the camera problems on a Antarctica trip, you'll remember that many of the people on that trip had card problems, too.
Personally, I'll stick with 2 GB cards as the biggest I'm willing to risk right now. If I was a working pro I might be even more conservative. How important are the photos you take? If a card failure means losing irreplaceable shots, the answer may be different that if you're shooting your kid's soccer game, and can just take more photos next week if you have to.
Personally, I'll stick with 2 GB cards as the biggest I'm willing to risk right now. If I was a working pro I might be even more conservative. How important are the photos you take? If a card failure means losing irreplaceable shots, the answer may be different that if you're shooting your kid's soccer game, and can just take more photos next week if you have to.