Partner and CTO, wollzelle

Next to being a core contributor to the Prototype JavaScript framework, he's the author of script.aculo.us, a cross-browser JavaScript framework featuring advanced Ajax UI controls, visual effects and other niceties, features born out of wollzelle's fluxiom asset management web application. Of course, he's also busy as a core development team member of the Ruby On Rails web development framework.
He's also doing world-wide seminars, workshops and presentations on various Web development themes. Recent locations include Vienna, London, New York, Vancouver and San Franscisco.
Thomas writes about all things web over at his blog mir.aculo.us.