.DS_store are hidden files Mac OS X creates into every folder in order to save non-vital appearance information such as windows position, background and file comments.
These files are generated automatically and are almost invisible to Mac OS X users, anyway, it would be a good idea to delete them if you are going to burn a CD or create a compressed file to share with someone who may adopt another OS, as .DS_store files can result superfluous and annoying.
DS_Store Cleaner is a small piece of software for Mac OS X (Mac OS X 10.3 or later is required) which can help you removing swiftly all .DS_Store files present in a folder and in its sub-folders and can be very useful if you share your compressed archives, CDs or memory sticks: just drag the folder you wish to clean into the application icon and automatically clean it. An alert box will notify about the number of .DS_Store files deleted.
DS_Store Cleaner is freeware and available also for Windows.

Today during the WWDC07 Apple announced that Safari 3 will be released also for Windows platform.

A beta version is already available here:
http://www.apple.com/safari/

According to Apple, Safari is 2 times faster than Internet Explorer 7 and up to 1.6 times faster than Mozilla Firefox.

I downloaded the beta version of Safari and installed it on Windows XP: the installation went smoothly but the browser gave a non critical error on starting. It’s really fast but I experienced some characters and pages rendering issues.
It’s still a beta version of course, but in my opinion the premises are good: waiting for a stable Windows release.