As regards the English Chaosium 7th Ed., latest news is Feb/March for hard copies to be delivered. YSDC always picks up news pretty quick on this:
YSDC News - Articles - Yog-Sothoth.comThe French and German versions are (I think) already out now, and by all accounts look absolutely amazing!
For myself, I still play using the older rules, but I might pick up some new stuff if it looks nice
