I don't keep a dead tree edition anymore. My logs exist on three different computers, two backup hard drives, and my Treo cellphone, however, so there is no fear of losing any data (and the last 100 dives are on my dive computer, too, if that counts for anything). Anything big enough to take out all of that redundancy probably took me out, too.
I'll print a summary from my computer anytime someone wants to verify something and handing them my Treo to glance over isn't sufficient.
At some point I'll probably print up a pretty one with fancy formatting and graphs, just for show, but it's pretty low on my priority list. And I'm certainly not going to lug it around with me... I have to too much stuff to bring as it is!