I started using RADRails as an Eclipse Plugin in late 2006 and it worked ok. As a stand-alone version I had some trouble so I used the plugin instead. Since then RADRails has been merged with the Aptana IDE and gained more functionality like auto-completion. I also tried the Aptana Web IDE and they are also really nice. The newest Aptana plugin is for Adobe AIR programming which makes creating AIR packages very simple.
Currently I am reading “ActionScript 3 and Flex” and I like the controls generated by Flex very much. I guess one could make very stylish forms with that and I am looking forward using them in future projects.