A short update: I added Worldsizer to the projects. It's a flash applet that lets you resize the continents (or rather subcontinents) according to their size in wealth, people or military spending. The graphics are kinda crude, but it's cool nevertheless.
Anything labeled "NEW" and/or "IMPROVED" isn't. The label means the price went up. The label "ALL NEW", "COMPLETELY NEW", or "GREAT NEW" means the price went way up.