As anticipated, IBM and Red Hat will join OpenStack Foundation as Platinum members.
Other big names at the same level are AT&T, Canonical, Hewlett-Packard, Nebula, Rackspace and SUSE.
Cisco, Cloudscaling, Dell, Dreamhost, Morphlabs, Netapp and Piston Cloud Computing are also joining the foundation as Gold members.
Citrix, which was an OpenStack supporter, is not mentioned in any announcement of the foundation despite its employees are still working with OpenStack on Xen hypervisor support.
Platinum Members will fund $500,000 per year (paid annually) with a three year commitment. Governance documents will allow Platinum Members to withdraw from Board and funding obligation if Foundation changes its mission. Gold Members will fund an amount equal to total company revenue times .025%, with a minimum of $50k and a maximum of $200k. In addition to the funding commitment, Platinum Members will provide operational resources to the Foundation such as staffing or development environment infrastructure. Resource requirements will be developed in more detail by the drafting committee, but the general expectation is a resource commitment that is consistent with staffing two full time equivalents.
According to the foundation wiki.
We suggest to read the article published on Gigaom.