If you've enabled location history, you can look at this data in the web interface at http://google.com/latitude

I suggest you check out google latitude - dashboard feature, its shows some amazing stats along with automatically detecting trips for you.

Um, have you actually tried using the Web interface?

Here's a screenshot from my vacation a few days ago.

http://greggman.com/downloads/examples/latitude-maps.png

Right, it only lets you view up to 30 days at a time. I want to see it all at once, and I wouldn't even mind if it's just a messy pile of incomprehensible lines. Something like this fog of war idea would be even better, though.

That completely sucks in comparison to the app posted here, unfortunately.

That may be true but my response wasn't to compare it to the app. It was in response to For that matter, I wish Google Latitude had any useful visual representation of the 2+ years' worth of location data I've been feeding it.

Latitude does have a useful visual representation. It also makes all the data available for you to do any other representation you'd like. See links in screenshot for downloading the data.

Some new importing sources are considering. Google Latitude is no doubt one of them. Stay tuned.