It’s not a small download, but all Apple says about the Lion Recovery Update is that it improves Lion Recovery and fixes a bug related to Find My Mac when using a firmware password. Hopefully you won’t have to rely on Lion Recovery, which enables you to perform some troubleshooting and to reinstall Lion by booting from a special hidden partition on your hard disk. Software Update is the easiest way to get and install this update. (Free, 431.91 MB)
Encrypted Screen Sharing in Snow Leopard
In Snow Leopard, screen sharing in iChat can now be encrypted if both parties sharing a screen have MobileMe accounts and have enabled encryption (iChat > Preferences > Accounts > Security).
Lion Recovery Update
Check out the Take Control ebooks that expand on the topic in this article:
Set up short abbreviations which expand to larger bits of text,
such as "Tx" for "TextExpander". With the new custom keyboard,
you can expand abbreviations in any app, including Safari and