Don't know how many of you guys are familiar with this product. It was released a couple of years ago and had some problems. They have re-released it and claim that the problems are fixed.
It is a system that keeps the interior of your guitar humidifed at about 45 to 50% RH.
I just got an email from Elderly about a sale they are having, putting these at about half-price for the two-pak kit (one for guitar body, another for guitar headstock, for use inside the case).
Before they had the leakage problem, everyone raved about these -- the only portable automatic humidity control available -- Bob Taylor was a big fan. Bob Taylor is once again a big fan, says Taylor has tested the new re-issue and found that it works great, etc., etc.
So, if interested in checking it out, go to the Planet Waves site ( www.planetwaves.com ) and click on "humidification" and read all about it. I've been awaiting the re-release of this product and just ordered three of them. If you want to wait awhile, I'll report my results.