I not only drive mine in the rain .. but in the ice and snow as well and have done so for about 12 years with no adverse effects. In fact, I was thinking about this thread last Thurs as I saw in traffic in a sudden downpour. This did remind me that there are some downsides that people haven't yet mentioned, one of which is that when the car is subjected to a large downpour (or going through car washes), the engine can start to have a mild misfire. If I recall the car wash threads, I think this is related to the coil packs getting wet. The second downside is that if you live on the prairies or midwestern states, getting caught in a sudden thunderstorm occasionally brings the possibility of it changing suddenly to hail which, depending on the size, is known to cause irreparable damage to hoods and roofs on steel bodied cars ... not sure about NSX's.