At this URL:
http://auctions.yahoo.com/auction/2498922
is a curious device.  I've seen remote engine starters, but this one is
especially cool.  It can even be programed to automatically start an engine
every 2 hours for short period, then repeat for 24 hours!  If I lived where the
weather gets WAY down into the super cold conditions, and sometimes had to park
where no electricity for a plug-in engine heater could be used, this is the
second device that I know of that would make life easy.  Check it out.

I have no affiliation with this listing.

The other device is the liquid fueled class of engine heaters.  I have one of
those for sale if someone wants a gasoline fueled water heater that has a 12
volt electronics package and draws a trivial amount of current.  Should someone
want it, it's for sale and was described in an earlier posting on the Vanagon
List.  I'll forward specifics to any interested parties.

John