Can the HTML Visual Designer tab be visible and functional while in a JSP file?
No, not yet.
I would also like to see a JSP, JSTL, and JSF element properties editor window or similar tool.
Don’t worry, its comming 😉
Have you guys looked at the beta of NitroX from http://www.m7.com ?
Yes, it looks to be a very nice product. We like to get ideas from our users and other competative products out there, so any “killer features” you see in M7, please let us know.