Other Integers for php 6

PHP developers, Are the requirements for PHP 6 set in stone? I saw in the minutes from the Paris meeting that a 64bit integer has been proposed. I am curious if it would make sense to allow integers to be both signed and unsigned. For me personally, I would love to have unsigned 64bit integers. I have a task that requires bitflag operations. Having only 16 bits to deal with is really bad (I only care about positive int). Having 32 positive bits in PHP 6 is certainly an improvement, but if I can get all 64, then live would be much better. http://www.php.net/~derick/meeting-notes.html#add-a-64bit-integer Thanks, Ezra