When the Macworld Conference & Expo kicks off next week, attendees can expect the usual buzz around consumer products – Steve Jobs is expected to formally unveil iTV, a video streaming device, during his keynote address on Tuesday and there is speculation that a new iPod and perhaps even an iPhone will be introduced. But there also will be a heightened focus on enterprise customers as Apple has in the past couple years bolstered its standing as a viable server alternative in corporate data centers.

Attendees can expect more details on Apple’s next release of its Unix-based operating system, OS X 10.5, code-named Leopard, for instance. Leopard’s debut is slated for the spring, but industry observers say Jobs may give an earlier date for its release during his talk. The operating system, which Jobs previewed at the Apple Worldwide Developers Conference in San Francisco in August, has a number of new features, including an updated version of Boot Camp, software now in beta that lets Windows run on Apple machines.

Other updates in Leopard include easier setup and search on the server side, a well as iCal Server, which lets users share calendars and perform other collaborative tasks. On the desktop, Leopard updates include an automated backup system called Time Machine and expanded Spotlight search, enabling users to search across networked machines.

In line with Apple’s growing enterprise focus, Macworld attendees will find an enhanced MacIT Conference, three days of training sessions designed for corporate Apple customers. The conference runs Wednesday through Friday and is aimed at educating IT executives about a range of issues, including integrating Macs into heterogeneous environments, imaging and deploying Mac systems and securing Mac environments.

About 40,000 people are expected to attend Macworld, which runs Monday through Friday at the Moscone Center in San Francisco, compared with some 38,000 attendees last year, according to show organizer IDG World Expo, a sister company of Network World. As for the MacIT Conference, about 750 attendees are expected, compared with 375 who showed up for the debut conference in 2003.

About 400 exhibitors, with more than 100 first-timers, will pack both the north and south halls of the convention center, says Paul Kent, vice president of MacWorld.