I just read on Perlmonks that there is a call for papers on the YAPC::Eu site.
Interesting that GUIs is one of the highlighted topics, but not very surprising now that every second Perl nerd suddenly has a decent GUI in MacOS X.
Last year in München I became very tempted to demo The GUI Loft, but now I'm back in a programming veggie mode again, so I don't know...