I'm sorry if this has already been discussed...
I downloaded a trial copy of lightroom 3 today and I can say that the high ISO noise reduction with this program seems clearly superior to anything I have been able to do with GIMP or DPP. It's much faster, the restults are clearly better, and it's easy to do. Better as in elimnates MORE noise while retaining MORE detail. This is based on some test shots at ISO 6400 on my Canon 60D and was pretty impressed with the results. Perhaps I just don't know how to use DPP or GIMP very well? I'm not sure I like the interface to import and export with LR3, are there other options I should be looking at?
(currently running a windows machine).