I don't like the bubble charts though -- when loading a new set of data the bubbles are completely rearranged making a quick glance comparison between two countries difficult.
That is one of the main problems with bubble charts. Unless you have a sophisticated packing algorithm, the layout of the chart won't have much meaning. For comparing the projects between countries, another method of display will have to be used.
I don't like the bubble charts though -- when loading a new set of data the bubbles are completely rearranged making a quick glance comparison between two countries difficult.