@happyjunk and others:
Regarding Zipping files to send to Windows users
I'm a Mac user (OS 10.6.8); Mac Pro.
Using the "Compress" feature in the File pulldown (main menu) is NOT the best solution for sending a Zipped file to a Windows machine. Doing so will result in the inclusion of specifically-Mac files that are extraneous (and confusing) to the Windows user, when he/she unZips the Zip file. Then, they reply to you and ask, "What are all these additional files?"
I highly recommend getting the app ZipFiles4PC. It solves the above problem.
Current version (at 8/7/2012) = 2.0.5
Here is info and purchase link ($14.00) on the developer's site: http://gotoes.org/sales/Zip_Mac_Files_For_PC/
The info explains how it rids the Zipped file of the extraneous (to PC users) Mac files.
You can also purchase ZipFiles4PC (same price) at MacUpdate: http://www.macupdate.com/app/mac/29404/zip-mac-files-for-pc/
and at the Mac App Store: http://itunes.apple.com/us/app/zip-files-4-pc/id413932072?mt=12
ZipFiles4PC is very easy to use. Just open up the app, and drag into its window the files you want to compress/Zip. It's that easy.
I've been using ZipFiles4PC for a year, and have had no more complaints or confusion from Windows users I send Zipped files to.
—David