It seems more like a publicity stunt on the part of the apartheid state as most of the released prisoners already served a majority of their sentences and were supposed to be released relatively soon anyway.
Also, the daily incursions into Palestinian villages, where many Palestinians are illegally abducted, have not stopped. So, it should not be long before the released prisoners' jail cells are restocked.
Israel's Political Prisoners
9,850 still remain unjustly incarcerated
105 are women
359 are children
40 are members of the Palestinian Legislative Council
Sources: Palestinian Ministry for Prisoner Affairs (July 2006), B'Tselem (Oct 2006)
Freed Palestinians welcomed home
Abbas welcomes freed Palestinians