Focus on Imaging isn't massively well advertised here, although it is advertised in the photography magazines which, I suppose, covers most magazine reading enthusiasts.
DPReview is usually the best place to keep up to date on everything. For the big shows like PMA, they run a day by day update on whats happened and any new kit. They're pretty good for news all round as well. The other place I use is the
Amateur Photographer website which is also very informative.