Because of the relatively low adoption of dynamic web charts we haven't been able to invest any more immediately into the project. We have to wait to recoup more of our initial development expense before we can affort to invest more into new features.
Sorry for the bad news... but the short story is that an update is not currently on our roadmap because of lack of product performance. Hopefully we will be able to address this at some point in the future.
We have started including the charts in our solutions, so perhaps that will bolster demand for charting by our customers, but currently it appears to be a very small audience.