This CNet article sums up what to expect at Apple's Paris Expo:
Although the release of the OS X beta is the known item on Jobs' agenda, the Apple leader could well pull up the curtain on other items. Apple updated all its desktop computers in July at Macworld, but its iBook laptop line has not been updated since February when Apple added the faster iBook Special Edition. Also, the current entry-level iBooks come in the tangerine and blueberry colors now obsolete in the iMac line.
One Apple dealer contacted last week said that stocks of the iBook as well as some PowerBook models were running low and that those available were coming from distributors rather than from Apple itself. A similar supply pattern preceded the revamped iMac line in July.