It works in 3.01 for me and I like it very much. Smooth, well conceived, easy to set up. But one request: the default map on the page is too tiny, and there doesn't seem to be a way to opt for a larger default display. There are larger sizes available via the listbox on the map popup but that's a lot more clicks than most users will do.
Also: the pins are the size of pinheads. Somewhat larger and more easily visible pins would be nice.
Apart from that, it's great. Thank you!