I was wondering if it is possible to include SVG content inside a panel (or whatever would work in GWT), be able to add more to the SVG (like add a circle or a curve) programmat
Whoa. This question has been left alone for awhile. - A fantastic (definitive?) GWT SVG library has been released! see lib-gwt-svg. There isn't anything out there nearly as good. The author (Lukas Laag) has been very responsive and has been working hard to keep the library updated and in top shape. The above link will take you to some impressive demos and you can always participate in the lib-gwt-svg forum.