Hey
I've been posting a lot of questions here, but haven't given a lot of answers
, so here is something for people who'd like to hibernate their macs in a car, it seems to be a good pairing with P1900 since it will not draw any current from your battery. On a 1.6ghz dual core Mac mini it goes to hibernate in less than 10 seconds and it will come back from it in 15-20 seconds. These are just estimates didn't really time it.
All you need to do is install this software:
http://www.mactelchat.com/download4.html
Of course this is only recomended for "newer" Macs. So everything 1ghz+ should work on both Intel and PowerPC platforms.