Wingpanel is, for those unaware, a rainy-day project recently created by the elementary team with the aim of making a minimal and unobtrusive desktop panel.
It’s early days for the real thing (i.e. buggy) so ‘mimicking’ it is the saftest option for those smitten with the style.
You can find the full guide over on justins’ blog. It doesn’t seem all-that difficult to follow along with so don’t be put off by the
If you’re not happy with the result you’ll find our previous post on quickly restoring the default GNOME panels of help.