Thanks!  Yes, that's a bit much for a sidegrade, since I have CS3.   At the time I upgraded to CS3, I wasn't aware that the was going to be a Lightwave plugin for PS Extended, so I passed.  Don't see how Adobe can expect to sell CS3 to Extended sidegrades a that price, especially when probably a small number of user's like myself would be interested.

Guess I'll wait for the next version.