MacRumors claims a domain name purchase by Apple suggests the company's upcoming tablet computer may be called iSlate:
The iSlate.com domain was originally registered in October 2004 by a company called Eurobox Ltd. It later changed hands to Data Docket, Inc. in 2006. In 2007, however, the domain was transferred to registrar MarkMonitor.com. MarkMonitor handles domain name registrations and trademark protections for many companies, including Apple. As is typical, however, the name of the actual registrant was initially hidden to obscure the identify of the actual owner. Up until this point, one could still easily dismiss all this as a simple coincidence.
However, after further investigation of the domain name registrant history, it seems Apple's name was temporarily exposed as the actual owner of "iSlate.com" for several weeks in late 2007.