While just browsing through Google Code repositories for R Packages-
I came across Playwith- which is basically a toolkit for creating interactive data visualizations. I then played with ClusterApp and it really seems promising (hierarchical) – Since I am using R 2.12 on Win 7 (x64) platform somthing broke but overall this seemed like a promising interactive tool making widget.
The playwith package is maintained by Felix Andrews <email@example.com>
- RPostgreSQL 0.1-7 (dirk.eddelbuettel.com)
- Creating GUIs in R with gWidgets (r-bloggers.com)
- R Project and Google Summer of Code: Wrapping up (r-bloggers.com)