I haven't experienced any so far, but I can tell you there are two scenarios that commonly produce hot pixels in digital SLRs:

1) If you've had the camera on for a long time and it gets hot. This could be caused by close proximity of the sensor and a hot battery, or just high exterior temperatures (hot summer day, shooting in a factory, etc.).

2) If you're shooting very long exposure times in dim light (particularly indoor light).