Great tutorial! I'm sure folks are going to love it!! I would also suggest that photographers check out
http://www.retouchpro.com - tons of great information there as well.
One suggestion I'd like to make - and that is regarding adding texture back in. Probably the best way is with a texture map from good skin (or patching and cloning from good skin sources), but if you're going to fake it by blurring and then adding noise, try this. Add the noise on a separate layer (overlay, using a neutral gray fill). then after you apply the add noise filter, add the emboss filter. You don't need much, just a bit, but it will add depth to the noise which mimics skin a bit better. Of course, doing this require you to then add a layer mask and paint the texture back in, but you should be doing that anyway.
Also, try blurring or smoothing on individual channels in differing amounts.