I've just come across another free noise filter programme called 'Helicon Noise Filter'. It's far simpler and quicker to use than NeatImage, and the results are definitely comparable. Unfortunately it's not available as a Photoshop plug-in (yet?) and the free version only saves in Bitmap or Jpeg (effectively no compression though) and doesn't have the bells & whistles of NeatImage.
Still, worthy of a try.
http://helicon.com.ua/pages/index.php?noisefilter
Still, worthy of a try.
http://helicon.com.ua/pages/index.php?noisefilter