300: This is AAAAAAAPPLE!

Some interesting Leopard hidden gems, as seen on Apple's new page dedicated to the next big cat... So take a deep breath and let's dive in!
Address Book
Google Map Addresses: View a detailed map of any address in Address Book.
Synchronize with Yahoo!
Automator
UI Recording and Playback: Use a new action called Watch Me Do that lets you record a user action and replay as an action in a workflow.
Workflow Looping: Repeat a workflow for a specified number of times or a specified time duration
Desktop
Spring-Loaded Dock: Just drag a file, hover over any application in the Dock, and press the Space bar the application opens instantly.
Finder
New folder options: Adjust the grid spacing.
Font Book
Printable Font Book.
Font Auto-Activation.
FrontRow
AppleTV like interface.
Streaming iTunes Content.
iCal
Inline Editing in iCal
Event Dropbox: Share the information you need for a successful meeting. Simply drag photos, video, or any kind of document into an event. Send email invitations to attendees and your attachments go along for the ride.
iChat
Recording: Save your audio and video chats for posterity with iChat recording
Multiple Logins
New AAC-LD Audio Codec
Watch for My Name: Receive an alert when someone calls your name in a group chat
File Transfer Manager
Imaging
Improved Tethered Camera Support: More camera models from Canon and Nikon are now supported
Network Scanning Support:Take advantage of new Bonjour-based network scanners
Mail
Forward as Attachment: Forward an email as an attachment instead of an inline message
Data Detectors: Mail automatically detects text fragments like appointments and addresses, and lets you choose smart actions with a click: create a new contact, map an address, or create an iCal event.
Photo Browser: browse your entire iPhoto library to find the photo you need for your message
Simple Mail Setup: Just enter your email address and password. Mail knows the email settings for 30 leading email providers, including Yahoo!, AOL, Gmail...
Archive Mailbox:Create an archive of your mailbox to back up important messages or to transfer your mail to another computer
Networking
Self-Tuning TCP: Let Leopard adjust TCP buffer size automatically.
Preview
Improved PDF Annotations: Add Stickies-style notes and links to websites or other pages within the PDF, highlight text.
More Image Manipulation Options: Crop, rotate, resize, and save images in a range of image formats.
Instant Alpha Background Removal: Easily remove the background from an image, leaving just the subject
PDF Manipulation in Preview: Move individual pages around, or remove pages. You can even combine PDFs with a simple drag and drop.
Batch Image Operations
GPS Metadata Support:Preview pinpoints the location where you took the photo on a world map.
Printing
Location-Aware Printing: Leopard detects when you’ve changed locations and figures out which printer to use and sets it as the default printer.
CUPS v1.3
Safari
Full History Search: Safari indexes all of the text in websites that you browse. Even weeks later, Safari will be able to find a web page that matches your search.
Remove History Items Periodically:Choose the time interval at which you’d like your browsing history to be automatically deleted.
Security
Tagging Downloaded Applications: Any application downloaded to your Mac is tagged. Before it runs for the first time, the system asks for your consent — telling you when it was downloaded, what application was used to download it, and, if applicable, what URL it came from.
Library Randomization: Leopard relocates system libraries to one of several thousand possible randomly assigned addresses to prevent a hacker’s code calling a known memory address to have a system function execute malicious code.
Spotlight
Dictionary Definitions in Spotlight
Advanced Searches: The Spotlight search field now supports Boolean logic with AND/NOT/OR and parenthesis syntax, and ranges including “greater than” and “less than.” Spotlight also understands quoted phrases and dates.
Search System Files
Calculations in Spotlight: Just activate Spotlight an equation, and Spotlight will instantly show you the result. Support for over 40 functions ranging from simple math to logarithms to trigonometry.
System
Icon Mode in Open and Save Panels
iLife Media Browser in Open Panel
Live Partition Resizing in Disk Utility
Guest Log-In Accounts
Grammar Check
Eject All Partitions: Enjoy greater flexibility when ejecting a partitioned USB or FireWire volume. You can eject just one of the volumes or all the volumes at once.
System preferences
.Mac Sync for System Preferences
Hot Corner for Sleep Display
TextEdit
Autosave
OpenDocument and Word 2007 Formats