Appleinsider claims to have some early details from the upcoming Mac OS X 10.4 revision (Tiger). According to the rumor site:
New features detailed include faster iDisk performance, and updated Finder and Mac OS X interface. The new version of Mac OS X will be previewed at WWDC in June.
Mac OS X 10.4 Tiger will include tighter integration with Apple's internet services and sport a refreshed Finder interface, according to reports that cannot be positively confirmed, but are believed to reflect accurate information on the latest builds of the OS.
New features detailed include faster iDisk performance, and updated Finder and Mac OS X interface. The new version of Mac OS X will be previewed at WWDC in June.