This post has been superseded by new instructions using the Google's updated API. I don't know for how long this version will continue to work.
This is partially for anyone who actually wants to know where I've travelled, but mostly because I found a really cool way of making a little map through Google API and I thought you might like to know about it.
I've used the "Where I've Been" app on Facebook for a while, and I wanted a more flexible version that I could use for my website.
A bit of a search and I found Google's funky chart API which gives a way of plotting all sorts of charts - including MAPS.
Pink is for places I've been; blue is where I'm hoping to go soon (not the only places I'm hoping to go soon, mind you).
The code (non-geeks may wish to look away now...)
The cool bit is the 'chld' field which takes two-letter country codes (to determine where to colour). And then for each country I have a number in the 'chd=t:' section stating whether it should be pink (0) or blue (100). You can of course make it more complicated with extra colours.
All credit to Google for making this possible (and relatively easy). I'm hooked :)