DOLOTO was been eagerly awaited by community for more than a year. The technique to optimize AJAX based applications named - Spitting the initial payload interested many but there was no formal tool to automate that. And most of the time people have to do that manually.
DOLOTO is brain child of Microsoft Research and more information along with installer can be found at below location. The idea is still fresh and you may want to share your results to “dolotofb at microsoft dot com”.
DOLOTO: Download time optimizer for Web 2.0 apps