As far as I can tell from the outside, France did provide one of the most detailed information about the European Constitution to its population - more than in Germany anyway.
And, while it's indeed widely suspected outside France, that the vote was influenced by dissatisfaction with the government, lack of available information on the issue is not a fact I can conceive.
Also, it is not true that the European Constitution, as drafted, voids the respective constitutions of the member states. What it does though, is making the European Union a judicial entity of its own right, and such would be a step from a Federation of States to a Federal State. (And the problems of federal states is something we Germans are familiar with <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" />)
The vote does NOT dissolve the European Union - it will just continue to exist, as is to date.
That stagnation may be deplored by some, as progress (and such change) is feared by others. Both sides have some valid arguments (and a lot of invalid ones) - it has just not developped enough for a majority to crystallize.
This is not a time for the impatient.