Browsing 100 Things To Do With Google Mashups I came across '55. Make your own Google Map out of any map'. A few minutes later thanks to maplib.net (affiliate link) and there's now an alternative convenient way to view the map from within a browser. Anyone can add markers and comments in the same way as you can on Google Maps. Click on 'More' at the top right to get links to the full screen version and do more with the map. (Note: I'm currently working on v0.4 of the mind map and there are quite a few changes'.
(If you see something other than the map above it's a bug. Please follow this link.