SIR CHARLES  Had email communication with developer, who was exceptionally responsive, courteous, and informative. There is no batch ability in PSE 6 (because PSE 6 has none) and there currently is no standalone app. NI's design philosophy of camera profiles and dynamic image profiles sure makes sense, though. I have made some suggestions regarding the Last Filter settings and I will report back when I hear from them. Hard not to like these guys. ;)  
(Version 4.52)

SIR CHARLES  Can I, or can I not, batch Neat Image filtering to multiple RAW/JPG files under PhotoShop Elements 6? Is there, or is there not, a standalone Neat Image program to do this for Leopard, as there is with SilkyPix? Are you, or are you not, developing this capability for the Mac? This request, on your forums, goes back to Aug 25, 2006.

I have to add that this software seems exceptional, but I am a PE 6 user and no batch capability looks like a deal breaker.  
(Version 4.52)

SIR CHARLES  Sadly as of this posting the website remains very obscure. I have spent several hours trying to determine how to batch Neat Image to multiple files in PhotoShop Elements 6.0. I had to go to forums to (I think) understand that their mention of a standalone program, which isn't mentioned on their Features page, only runs on Windows. At least I think that is the case.  
(Version 4.52)