Note: wget is not exists in Leopard,  you should set up an alias for wget to curl -O which does exactly the same thing:

echo 'alias wget="curl -O"' >> ~/.bash_profile

Your are done. Now just easy to use in Terminal. Here example to download iTunes.
wget http://appldnld.apple.com.edgesuite.net/content.info.apple.com/iTunes9/061-7203.20100330.XswP8/iTunes9.1.dmg

Curl is better than wget for the following reasons:

• Uses libcurl a cross platform library
• curl sends more stuff to stdout and reads more from stdin
• curl supports ftp, ftps, http, https, scp sftp, tftp, telnet, dict, ldap and ldaps while wget
• supports only http, https and ftp
• curl has ssl support
• libcurl supports more http authentication methods
• Curl is bidirectional while wget offers http post support only
• Curl has more development activities.

In fact, curl offers substantially better download statistics during
interactive use. It also has th excellent libCURL, which programs in the
operating system leverage as a transport layer. This is simply not
possible using wget, and writing an HTTP 1.1 client is pointless when a
really good one is already available.

Anything you can do with wget you can do with curl (with a little effort),
but no amount of effort will result in a well-factored libWGET. You can
(and I have) implemented recursive retrieval by passing the output of curl
through a sed script to find tags and download the target with more
curl invocations.

A wget replacement for MAC OS X is a post from: My MacOS X

Here are some very useful terminal commands and tips for hidden Mac OS X settings.

All subjects

• Finder
• Dock
• Spaces
• Desktop
• Time Machine
• Spotlight
• ISO CD/DVD
• Remote Desktop
• Network
• System commands
• Applications and processes
• Files management

The best collection of handy Terminal Commands for Leopard Tweaking is a post from: My MacOS X

Click the top “split” button or press Command+D shortcut and now you’ve got your window split into two usable panes like so:
To collapse the window press Command+Shift+D

ALso, you can do multiple splits. Aside from general speed increase I think split pane in Terminal is my new favorite feature.

See the Terminal Splits Windows Movie:

Terminal Split Windows in Snow Leopard 10.6 is a post from: My MacOS X

One of the preferences is greatly missed was to automatically start playing a movie when it was opened.

But you can re-enable that behavior with the following Terminal command:

defaults write com.apple.QuickTimePlayerX MGPlayMovieOnOpen 1

The movie will now start when opened without you having to press the Play button.

Enable autoplay of movies in QuickTime Player in Snow Leopard is a post from: My MacOS X