Forum OpenACS Q&A: Response to Open ACS kernel + ACS modules
Ask here, and we'll mostly say, "I dunno, the Tcl version has served me well" and, like you, list sites we've developed with it :)
There's nothing wrong with asking here, it's just that the Java fans live elsewhere, i.e. at aD.
Feel free to post questions or requests for help with ns_xml here at openacs.org - probably in another thread so folks will see them more readily.