>eeminds me of the Alice Sheldon's (AKA James Triptree, Jr.) short >story "Backward, Look Backward." Tiptree. Alas, that one's not at http://www.bestsf.net/s2t.html but two of her most famous stories are. Another accelerating jumper is Charlie Stross's suitably-titled ACCELERANDO, due out soon. Damien Broderick