Maybe, but one of the issues here is that we need to have an integration with the OpenACS shell so the debugger could run and see if the code works.
You might want to ask this also at the AOLserver list, I think someone wrote an nsd shell where you could run TCL commands like in AOLserver itself.
Last but not least, what should be the focus of such an IDE. I would like to have easy access to commands (clicking on a command takes me to the doc page) and command completition. Auto formatting is a plus as is the ability to see where a variable comes from (if I click on a variable name, I will see where it was set, either in .sql or .tcl).