Windows 7 has a lot of things to offer, especially if you've got recently purchased hardware. But even with all the bells, whistles, and features from Vista that finally work right, it still could use a few more built in power user style options. One change that I was very happy to make not long ago was to my home machine's logon screen.
I borrowed some World of Warcraft icons for my user logins and the picture below to give myself a nice system metaphor. The Tweaks.com logon changer is a pretty straightforward program, so I'll let the screenshot speak for itself.
Below is a link to the logon screen changer.
http://download.cnet.com/Tweaks-com-Logon-Changer/3000-2094_4-10911825.html