The unveiling of the hub is part of an update on the alliance's activities that is being provided Wednesday. The group will announce a near-doubling of its membership since its formation in February. New members include The Ajaxian, American Greetings, Bling Software, Curl, edge IPK, eLink Business Innovations, ENOVIA, MatrixOne, Finetooth, The Front Side, Ikivo, ILOG, IN2, IT Mill, Javeline, JWAX, Merced Systems, Nexaweb, Nitobi, OpenLink Software, Seagull Software, Sitepen, Sun, Vertex Logic, Vircon, Webtide, and Zoho.

Previously announced members of the alliance include: Adobe, Backbase, BEA Systems, Borland, the Dojo Foundation, Eclipse Foundation, Fair Isaac, Google, IBM, ICEsoft, Innoopract, Intel, JackBe, Laszlo Systems, Mozilla Corporation, Novell, Openwave Systems, Opera, Oracle, Red Hat, SAP, Scalix, Software AG, Tibco, XML11, Zend, and Zimbra.

While the alliance already has an impressive list of members, one name remains conspicuously absent: Microsoft.

"Yes, we have extended an invitation and attempted to recruit Microsoft to join," Ferraiolo said. "We would love to have Microsoft participate in the alliance."

"The purpose of the alliance is to make interoperability successful such that you can take AJAX technologies from one source and use it with another vendor's. Microsoft is one of [those] vendors and an important vendor in the AJAX community and it would be to everybody's advantage, particularly customers, if Microsoft's products would interoperate well with other people's products," said Ferraiolo. He added he was not making a statement that Microsoft products currently do not interoperate.