I would love to use this, but then host the resulting content myself. Maybe you could offer exporting a trip for a fee?
What I think of is the classic comedy sketch scenario of being invited to a friends house to view a slideshow or home movies of their last trip.
People like to share this stuff... that's obvious. What seems harder to admit is that nobody else cares.
On the "who cares" side: it's actually an improvement to be able to say on $socialnetwork "here's my trip, take a look at it" rather than having to sit your friend through a one hour show off :)
During and since that trip, I have often thought about building something to make sharing those kind of experiences easier. I think TripStamp hits some of those points, but one major problem that would be difficult for TripStamp to solve in its current incarnation is that of being able to make updates while offline, and have them sync whenever internet is available. (I'd often write blog posts in my tent at night and then upload them from whatever public WiFi I could find the next day, and I think that would apply even more to people travelling in remote locations where a lot of this "exciting" travel happens.)
However, there's the mapping and the layout, as riffraff points out. There's not really a quick and easy way for me to create this kind of integrated thing myself.