I think it looks horrible hokey, but I've seen people use tuperware
containers to put their ecu in.
I think I would get a waterproof plastic box, like the kind river runners
keep valuable goodies in, make a nice hole the grommet for the wire bundle
to go through.
I'd want it ventilated too slightly.  
Either than or if it's a westy move it up and put it below the rear cabinet.
Almost all cars have their ecu's in the passenger compartment these days. 
Scott
www.turbovans.com 

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Geza Polony
Sent: Thursday, December 27, 2007 11:07 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Followup to last month's "Thar I was"

"Something waterproof"--you mean like a zip-loc bag? One of those might do
the trick though I'm not sure how you'd seal it where the wiring harness
comes out. Or?