Xcode 3.0
Xcode 3.0 has been overlooked considerably with all the hype of Leopard.

Xcode has developed into a sturdy application over the years and now features iChat like notifications as well as speed increases. Xcode now supports Objective-C 2.0.
Xcode 3.0 now bundles Xray, a timeline based method of debugging and optimising an application, as well as the Research Assistant which keeps handy documentation near by.
Of note Xcode 2.3 has been released to developers via an ADC subscription.
Mac Pro Images, Notes and Details

Apple has posted its official Support Documents for the Mac Pro, which offer an interesting background on the inners of the machine.
Leopard , Leopard Server, Screenshots
RSS Feeds support has now been added to Mail.app in Leopard, although it is not pointed out during the Keynote or on the promotional video it is listed as a feature on the Mail.app page.

In a screenshot of Leopard, a Folder on the right hand side of the dock clearly shows a black triangle underneath it. Similar to the one shown under an open application. At this point in time it is unknown what this indicates. (It should be noted that iCal is clearly open but no triangle is present.)
An extensive over view of Mac OS X 10.5 Leopard Server can be viewed on the official Apple website.



