According to RandomHouse.com, Sean Williams’ upcoming novel is, indeed, Star Wars: The Old Republic: Fatal Alliance. They have updated the page to state that it will be a hardcover with 432 pages, slated for a current release on July 27, 2010.
While no official announcement regarding the novel has been made, the site can be taken as official; that is what we are looking at in terms of the TOR novel at this point.
Amazon.com has now given Sean Williams’ The Old Republic novel a title; entitled Fatal Alliance apparently, the novel will also be 432 pages, according to the online shopping site. The hardback is listed for release on July 17, 2010 still, although Random House has it listed for July 27, 2010.
There has yet to be any official confirmation for the title, and really for the novel itself, even though it does have an official page.
Source: Ewan (SWbook.co.uk)