In order of use...

1) Dual display portable DVD system for the kids

2) Fan to push/pull the A/C around in the van in the
     hot AZ summers!

3) Air Compressor

4) Non 12 v. but we use them like crazy.. small flexible
    magnetic mount 3 led lights.  I have like 4 of them scattered
    throughout the van.  You can find them at Harbor Freight.. they
    make great little reading lights for the kids at night etc:   Not
    on their website but in store.  A bit pricey at $7.99, but wait till
    they go on sale. (I got 4 for $12 bucks at their last sidewalk sale deal)

 -tim

ps:  This looks interesting!
       http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=90599

90 Syncro Westy
http://timschneider.org