Photoshop :: Digital Landscape Photography - Filter Emulation

I have now finally taken the plunge and added a D100 to my camera bag (cracking camera).

Having been to a local camera club however I was dissapointed to see that all the phorographs displayed had drastically overexposed sky's and much detail lost as a result. It strikes me as somewhat lazy that nobody appears to have made any effort to compensate for this.

I do like night / available light photgraphy and notice from working with friends on night shoots that digital cameras can give unnatural daylight effects (partly because they dont suffer reciprocity I guess).

When using my F100 I would naturally tend to use filters (polarizer, ND grads etc) to retain some colour and detail in the sky. Similarly when using Mono I would use the usual red, yellow, green filters etc or I guess I could carry on using my Cokin P filters with my D100 or get a similar effect using photoshop (one I have worked through a few tutorials)

I know that P/Shop can emulate grad filters but what about polarizers?