this is just one of the many effects in the new .47 version.
this is called cloning to a 2 tone..although cloning has many many more uses.

Inkscape in my opinion is the best scalable vector image creator out there.
Any image you create with Inkscape can be scaled to any size and keep its resolution.
many new effects are included in the .47 version like
path effects
filter editor (make your own effects and save them)
Spiro...a brand new paths effect add on...very nice smooth path maker.
these are just a few of the great new add ons...soon Inkscape will be able to animate.
(probably in the .48 version)
here is probably the best link out there (i use all the time)
http://screencasters.heathenx.org/real nice video tutorials (some are very big)..just a warning.
any who, i also have all the video tutorials uploaded so if you just want a particular episode
to just look at offline......holler at me and ill throw the link to the dl at you pm or whatever.
These videos will get you started, you will love the ease of use.
Inkscape is a very useful FREE open source program for creating Icons, Logos, and pretty much anything you want to print. "Meet The Gimps" logo was actually redone by HeathenX, so it could be scaled larger and look better.
have fun with it! =)