Here
Nothing particularly new but a useful summary.
One can use any ICAO PPL to fly a G-reg worldwide VFR till April 2014, so the current automatic validation continues till then.
It seems that not many countries have applied to EASA for a derogation on N-regs, so these people may be flying illegally as from today. I wonder whose job is to enforce that? The country of operator residence - a concept without any meaningful definition? What a bizzare situation. What a load of idiotic expense gravy train riders in brussels to have done this.
Here is a nice article on it, in English and German.