You can find it here now:
http://www.jewelslab.com/index.php/auxpecker-free Ricardo is the person that has helped me to write the Auxpecker plug-in. Now he is hosting the file and it seems he make an update. But I can't find how to download it.
I have stop the blogspot website as I was getting a lot of spam from there. I was fed up so I delete everything...not very smart, but efficient. No more spam now

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If you can't download it from Ricardo website, PM me with your email and I will send you the file.
EDIT: I get it, you have to register to be able to download the file.
EDIT: I'm very unhappy by the fact that McNeel have not include the same kind of tool in V5. With the shadow it could have been a very nice feature.
It seems they haven't understand how usefull this basic preview was. Few days ago I have received an email from a customer who worked with Signce and I was very surprise that such big design company use Auxpecker for their product/concept presentation.
EDIT: i have install the Auxpecker update...nothing new, but the outlook is more refreshing. You can see a printscreen here
http://jewelslab.blogspot.com/