I'm still undecided about whether or not a "Work in Progress" blog is a good thing to have on portfolio website. After all, the discussion goes on about when to show artwork to your client. What part of the creation process is far along enough that clients will be impressed with your skill, or at the very least, won't think that you have less skill than a W.I.P. piece might make it appear to them?
After all, most clients and hiring recruiters aren't artists. Obviously, this statement isn't meant to belittle them. Trained artists have an ability to spot potentially good artwork at its foundation. Through good composition, early lighting setups, topology, anatomical accuracy - trained artists are able to recognize a potentially good art piece before it looks even notable to most people.
The thing is, most people are usually the ones doing the hiring. This isn't so much a problem as it is just something to be aware of. You have to cater your portfolio to who is looking at it, because it has to impress them before it gets to well versed artists.
So, will I post work in progress artwork as I create it? Maybe not. However, I may write a making of blog piece while I create my new portfolio pieces - then post it here once I'm finished.