Safari (6 in Mac OS 10.8)
The Sharing button (to the left of the search/address field, a square with an arrow coming out of it) now has the alternatives:
* Add to Reading list (offline)
* Add bookmark
* Email this page. In Apple Mail you can choose format (Web page, PDF or Link only).
* Message, iMessage with your Apple ID, link only.
* Twitter, link and what you write in a Twitter message.
Safari now has a connection to Notification center so web sites can send notifications there.
The iCloud button (the cloud icon) should gives you the possibility to see open tabs on other iCloud enabled devices (Macs, iPhones, iPads and iPod touchs) and then clicking them to open them on this device as well. For some reason this doesn't work for me, probably because my other Mac has 10.7/Lion (not M Lion/10.8) and my iPad and iPhone has iOS 6.
Launchpad
Now (in 10.8) it is possible to search within Launchpad. At first I was annoyed because <cmd> + <F> didn't get me to the search field but you get there directly as soon as you start to type. You can also use the arrow keys to move around in Launchpad view.
iCloud document storing:
Apple's applications; Textedit,Preview Pages, Numbers and Keynote can store documents in iCloud and they are then accessible from other iCloud enabled devices (Mac OS 10.8/iOS 5).
If you click in the title bar of a document you can choose to move it to iCloud.
Instead of opening a document you can mark it in the iCloud view and then click the Sharing button (lower left corner, a square with an arrow coming out of it) and choose to e-mail, message, twitter, AirDrop it or send it to Flickr. Available options depend on the type of document. The sharing alternatives are also available via right-click on the document.
To sort your documents you can drag and drop them onto each other to create folders which you then can rename.
