JBDS 7/JBT 4.1 will release this summer.
JBDSIS/JBTIS will have pre-releases compatible with it coming out over the summer too - once they reach Final/GA we will make them available for easy installation from inside JBDS/JBT.
For now we've been playing catchup to get a smoother announcement and installation setup running - I excpect us to be able soon to have a smoother experience.
Until then try the sites Paul referenced.