However, if you prefer to make your source a bit more obfuscated, the tool you can use would be Dean Edward's Packer. This tool obfuscates your script, saving thus quite a fraction of the file size. However there's only one rule your scripts need to obey to use this tool:
I've conducted a test to see which technique is better to use, file size wise. I've tested the jQuery framework's latest version available 1.0.3 (original size 51120 bytes including comments). This is what I came up with:
|No Gzip||With Gzip|
|JSMin||30076 bytes||9587 bytes|
|Packer||18923 bytes||9731 bytes|
You can see on the results that using Gzip the file size won't differ that much. It's up to you which tool you decide to use.