I think I'll get a new one at the end of the summer.

I got mine in 02, BUT - it spent a good part (ok most of the time with the exception of about 10 rides until Feb of this year) in storage until I got a bike and really started RIDING.

The helmet was in perfect, out of the box shape, too.

Now it looks used. I'd love to get a new one now, but since I keep working on my bike, it will wait. The foam isn't dry or crumbly at all, the pads are in good shape... so I'll wait until the end of the summer for a new swanky lid.