I've just released GPE Screenshot 0.4 which is the first public release.
GPE Screenshot allows the user to save a screenshot to the local filesystem or upload it to http://handhelds.org/scap/. Thanks go to Russ Nelson for adding PNG upload support to the cgi scripts on handhelds.org.
Screenshots are taken from the X server using some code from gnome-screenshot which is part of gnome-utils. With minor modifications to the source code it is, however, also possible to use external applications such as fbgrab or import to grab screenshot images.
Source code is available from the usual place, a .bb is in OpenEmbedded already, and binary packages will follow soon.