We currently have one interactive visualisation on our website and would like to add more like it: e.g. http://www.gfmii.com/?country=Singapore
This one is a simple scatterplot using nvd3, which we chose mostly because it offered a simple scatterplot with animated transitions, automatic axes, and clickable tooltips, but there are a few things we would like to improve: a.) how it pulls, filters and sorts data (it's a bit slow with large sets), b.) we'd like to make the tooltips clearer, and c.) most importantly, we need a share button where a generated scatterplot with our logo on it can be shared as an SVG or PNG by email or Twitter/LinkedIn/Facebook. More likely though, we'd probably start by adding some of the new visualisation ideas I'll mention below.
We are open to using / adding other charting libraries based on either D3/SVG or HTML5 Canvas, so long as they are compatible across many browsers, mobile friendly, and can be shared with our logo on it.
Some of the other visualisations...