Jay - got your email, but I'll post the link here since your query may attract others. I should stress I developed this action in PS
6 for the specific purpose of sharpening slide scans at A.net resolutions while minimising grain - its not particularly original, but does combine what I think are the best aspects of a number of grain reducing/sharpening techniques - I should stress this is NOT for digital images - it won't ruin them, but nor will it get the best out of them.
As to other actions - there must be thousands on the net in various places, but most of them tend to be "effects" (which I personally don't like) or not very well done. A good source for genuinely useful actions is http://www.fredmiranda.com
. His actions are all pretty subtle, do what they say they'll do, and produce something which still looks like a photograph at the end. A particular favorite of mine is his Digital Velvia which can save many a lifeless image. He does make a small charge for the actions, but they are well worth it.
Colin K. Work, Pixstel